flutter.com

flutter.com is SSL secured

Free website and domain report on flutter.com

Last Updated: 23rd November, 2021 Update Now
Overview

Snoop Summary for flutter.com

This is a free and comprehensive report about flutter.com. The domain flutter.com is currently hosted on a server located in Dublin, Leinster in Ireland with the IP address 52.17.142.199, where the local currency is EUR and English is the local language. Flutter.com has the potential to be earning an estimated $6 USD per day from advertising revenue. If flutter.com was to be sold it would possibly be worth $4,111 USD (based on the daily revenue potential of the website over a 24 month period). Flutter.com receives an estimated 1,971 unique visitors every day - a large amount of traffic! This report was last updated 23rd November, 2021.

About flutter.com

Site Preview: flutter.com flutter.com
Title: Flutter™ » Providing Global Sports Betting, Gaming & Entertainment
Description: Home - Flutter
Keywords and Tags: business, gambling
Related Terms: flutter developer, flutter tutorials
Fav Icon:
Age: Over 22 years old
Domain Created: 26th March, 2002
Domain Updated: 30th March, 2020
Domain Expires: 26th March, 2022
Review

Snoop Score

2/5

Valuation

$4,111 USD
Note: All valuation figures are estimates.

Popularity

Modest
Note: Popularity is estimated.

Rank, Reach and Authority

Alexa Rank: 332,038
Alexa Reach:
SEMrush Rank (US):
SEMrush Authority Score:
Moz Domain Authority: 0
Moz Page Authority: 0

Organic vs Paid (Google Ads)

Traffic

Visitors

Daily Visitors: 1,971
Monthly Visitors: 59,991
Yearly Visitors: 719,415
Note: All visitors figures are estimates.

Visitors By Country

Revenue

Revenue

Daily Revenue: $6 USD
Monthly Revenue: $171 USD
Yearly Revenue: $2,050 USD
Note: All revenue figures are estimates.

Revenue By Country

SEO

Backlinks Analysis (SEMrush)

Top New Follow Links

Top Ranking Keywords (US)

Domain Analysis

Value Length
Domain: flutter.com 11
Domain Name: flutter 7
Extension (TLD): com 3
Expiry Check:

Page Speed Analysis

Average Load Time:
Load Time Comparison:

PageSpeed Insights

Avg. (All Categories) 66
Performance 70
Accessibility 88
Best Practices 69
SEO 83
PWA 22
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://www.flutter.com/
Updated: 23rd November, 2021

2.71 seconds
First Contentful Paint (FCP)
62%
18%
20%

0.00 seconds
First Input Delay (FID)
100%
0%
0%

Simulate loading on desktop
70

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for flutter.com. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Time to Interactive — 1.5 s
The time taken for the page to become fully interactive.
Total Blocking Time — 0 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Cumulative Layout Shift — 0.001
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Audits

Max Potential First Input Delay — 60 ms
Users could experience a delay when interacting with the page.
Network Requests
Below is a list of network requests that were made during page load.
URL Protocol Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://flutter.com/
http/1.1
0
221.34099993855
307
0
301
text/html
https://www.flutter.com/
http/1.1
221.73699992709
3469.5389999542
14330
68235
200
text/html
Document
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_zLo3j1_-BMKD8nuPRn3Qwp6Ckd5TlypCoxlUf3m_Ezk.css?qucnxq
http/1.1
3492.6699998323
3805.994000053
47506
301752
200
text/css
Stylesheet
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_SDs14ESsrvvU79cAx4bfHfcJEsbEdLvHhphDuD0MpiU.css?qucnxq
http/1.1
3492.8649999201
3826.3969998807
97884
767726
200
text/css
Stylesheet
https://cdnjs.cloudflare.com/ajax/libs/Swiper/3.4.1/css/swiper.min.css
h2
3493.2329999283
3538.0809998605
3590
17762
200
text/css
Stylesheet
https://www.flutter.com/sites/paddy-power-betfair/files/new-logo/logo.svg
http/1.1
3498.3619998675
5775.9159998968
1686
3100
200
image/svg+xml
Image
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/our_business_menu.png
http/1.1
3498.6649998464
3797.8709999006
124443
124091
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/Hartley_Betfair07911.png
http/1.1
3499.2759998422
6479.9269998912
110221
109869
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/pride_bus_meganav%20(1).jpg
http/1.1
3499.9740000349
6042.6449999213
38887
38537
200
image/jpeg
Image
https://www.flutter.com/sites/paddy-power-betfair/files/media_meganav.jpg
http/1.1
3500.3639999777
3865.6299998984
29038
28687
200
image/jpeg
Image
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
http/1.1
3500.5530000199
3768.4009999502
22216
21866
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
http/1.1
3500.7569999434
3899.6599998791
60542
191085
200
text/javascript
Script
https://cdn.jsdelivr.net/bootstrap/3.3.7/js/bootstrap.min.js
h2
3501.1809999123
3536.376999924
11118
37045
200
application/javascript
Script
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_2CV_tf0x9FSEhAGEQbwQkSfpRzLZrvFU1Y67WrDT2g0.js
http/1.1
3501.3520000502
3831.6689999774
15538
65501
200
text/javascript
Script
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMainConfig.js
http/1.1
3501.8430000637
4110.9799998812
2629
6886
200
text/javascript
Script
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MT2QBbybs-1DtknsbwaM-hCSDAAIiJlHCKMsxinWS2s.js
http/1.1
3502.116000047
3937.4219998717
36253
133889
200
text/javascript
Script
https://code.jquery.com/ui/1.12.1/jquery-ui.js
h2
3502.4909998756
3529.7270000447
124871
520714
200
application/javascript
Script
https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/1.0.0/handlebars.min.js
h2
3502.5779998396
3538.6550000403
13168
50170
200
application/javascript
Script
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_6HfUi4GwIIk_CNvqMS-1vWfrcpyqM5nFob0M71Yj-dA.js
http/1.1
3503.6689999979
3803.2720000483
96698
521106
200
text/javascript
Script
https://use.typekit.net/esq0mqz.css
h2
3834.5240000635
4148.1109999586
1356
7213
200
text/css
Stylesheet
https://p.typekit.net/p.css?s=1&k=esq0mqz&ht=tk&f=9785.9786.9787.9788.9789.9790.9791.9792.9793.9794&a=643807&app=typekit&e=css
h2
4149.8239999637
4191.4299998898
317
5
200
text/css
Stylesheet
https://irs.tools.investis.com/clients/uk/flutter-paddy-power/Ticker/ticker_head.aspx?culture=en-GB
http/1.1
4197.7259998675
4346.910999855
1587
2618
200
text/html
Document
https://www.flutter.com/modules/contrib/we_megamenu/assets/images/ico-arrow.png
http/1.1
4255.2119998727
4493.6450000387
19142
18792
200
image/png
Image
https://www.flutter.com/modules/contrib/we_megamenu/assets/images/ico-arrow-white.png
http/1.1
4255.4389999714
4580.2660000045
18880
18530
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/f-graphic.png
http/1.1
4259.3439999036
6942.9470000323
67070
66720
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/result-1.png
http/1.1
4260.85099997
4391.3650000468
281408
281055
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/2020-03/LSE_Flutter_052.jpg
http/1.1
4261.7269998882
4499.0469999611
161852
161498
200
image/jpeg
Image
https://www.flutter.com/sites/paddy-power-betfair/files/homepage%20CSR.png
http/1.1
4262.6559999771
6981.9139998872
347529
347178
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/custom%20%E2%80%93%201_0.png
http/1.1
4263.8890000526
7027.4189999327
457396
457045
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/cross-overlay.png
http/1.1
4264.3939999398
4441.1569999065
30925
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200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/careers.png
http/1.1
4265.3599998448
4657.7490000054
1013611
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200
image/png
Image
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h2
4268.7729999889
4305.0740000326
24686
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200
application/font-woff2
Font
https://www.flutter.com/themes/investis_bootstrap_t2/Fonts/fontawesome-webfont.woff2?v=4.7.0
http/1.1
4268.972999882
7084.4409998972
77486
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200
application/octet-stream
Font
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h2
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26502
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Font
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h2
4269.7369998787
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24022
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application/font-woff2
Font
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h2
4270.2419999987
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25394
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application/font-woff2
Font
https://geoid.investisdigital.com/
http/1.1
4407.9149998724
6984.5509999432
822
22
200
text/html
XHR
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMerged.js?1637631067810&_=1637631067665
http/1.1
4525.646999944
7344.2219998688
61612
348951
200
text/javascript
Script
https://www.flutter.com/sites/paddy-power-betfair/files/banner-images/Header%20Image%203.png
http/1.1
4539.3039998598
4805.8380000293
1776634
1776280
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/stadium.png
http/1.1
4539.655999979
4890.3099999297
1873545
1873191
200
image/png
Image
https://www.flutter.com/undefined
http/1.1
4584.3859999441
7767.341000028
52563
51423
404
text/html
Image
https://use.typekit.net/xlo7mwe.css
h2
4599.9119998887
4687.2069998644
1193
4537
200
text/css
Stylesheet
https://irs.tools.investis.com/clients/default/scripts/iframeResizer_child_v2.js
http/1.1
4601.0280000046
4743.0149998982
3185
6576
200
application/x-javascript
Script
https://p.typekit.net/p.css?s=1&k=xlo7mwe&ht=tk&f=9785.9786.9787.9789.9791.9792&a=643807&app=typekit&e=css
h2
4688.7519999873
4710.8139998745
317
5
200
text/css
Stylesheet
https://use.typekit.net/af/5c84c3/00000000000000000001787b/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3
h2
4718.6059998348
4742.4359999131
24686
24368
200
application/font-woff2
Font
https://www.googletagmanager.com/gtm.js?id=GTM-WZ7GBGW
h2
6989.7739998996
7028.6649998743
44427
116154
200
application/javascript
Script
https://www.google-analytics.com/analytics.js
h2
7068.2449999731
7074.7439998668
20631
50205
200
text/javascript
Script
https://www.google-analytics.com/j/collect?v=1&_v=j96&a=1540379976&t=pageview&_s=1&dl=https%3A%2F%2Fwww.flutter.com%2F&ul=en-us&de=UTF-8&dt=Flutter%E2%84%A2%20%C2%BB%20Providing%20Global%20Sports%20Betting%2C%20Gaming%20%26%20Entertainment&sd=24-bit&sr=800x600&vp=1350x940&je=0&_u=YEBAAAABAAAAAC~&jid=1607774014&gjid=1005872767&cid=1760989595.1637631070&tid=UA-18193182-3&_gid=390809779.1637631070&_r=1&gtm=2wgba1WZ7GBGW&z=1414957621
h2
7108.3360000048
7111.8880000431
613
1
200
text/plain
XHR
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/css/videoplayer.css
http/1.1
7375.5220000166
9583.4419999737
5949
36048
200
text/css
Stylesheet
https://edge.api.brightcove.com/playback/v1/accounts/1555966121001/videos?q=tags%3Abetair&sort=reference_id&limit=50&offset=0
h2
7649.2699999362
7759.9039999768
16474
15193
200
application/json
XHR
https://edge.api.brightcove.com/playback/v1/accounts/1555966121001/videos?q=tags%3Abetair&sort=reference_id&limit=50&offset=0
h2
7633.0719999969
7648.688999936
987
0
200
Preflight
https://www.google-analytics.com/collect?v=1&_v=j96&a=1540379976&t=event&ni=1&_s=1&dl=https%3A%2F%2Fwww.flutter.com%2F&ul=en-us&de=UTF-8&dt=Flutter%E2%84%A2%20%C2%BB%20Providing%20Global%20Sports%20Betting%2C%20Gaming%20%26%20Entertainment&sd=24-bit&sr=800x600&vp=1350x940&je=0&ec=Scroll%20Tracking&ea=%2F&el=0%25&_u=aEDAAAABAAAAAC~&jid=&gjid=&cid=1760989595.1637631070&tid=UA-18193182-3&_gid=390809779.1637631070&gtm=2wgba1WZ7GBGW&z=1145103092
h2
9620.4939999152
9623.3599998523
597
35
200
image/gif
Image
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
3514.254
15.435
3530.552
6.11
3847.619
11.295
3869.485
30.177
4188.714
5.3
4232.893
7.82
4240.726
156.672
4397.748
117.867
4525.977
7.093
4534.728
17.827
4567.521
50.181
4672.69
9.924
4755.948
5.074
4809.229
9.232
4872.68
19.834
5816.502
6.353
7025.838
6.412
7080.5
9.207
7091.797
14.405
7121.174
27.899
7151.583
8.464
7161.937
9.195
7400.765
16.16
7419.428
7.172
9628.309
13.387
9647.375
12.825
10583.534
8.849
10592.4
7.254
10608.604
9.604
10641.736
5.367
10954.41
5.627
11132.893
8.21
11152.107
5.485
11824.963
8.083
11846.084
6.142
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data
Script Treemap Data
Provide as required, for treemap app.

Other

Properly size images — Potential savings of 9 KiB
Images can slow down the page's load time. Flutter.com should consider serving more appropriate-sized images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
21866
9263
Defer offscreen images — Potential savings of 14 KiB
Time to Interactive can be slowed down by resources on the page. Flutter.com should consider lazy-loading offscreen and hidden images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://www.flutter.com/
14330
14330
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Flutter.com should consider minifying CSS files.
Minify JavaScript — Potential savings of 103 KiB
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Flutter.com should consider minifying JS files.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://code.jquery.com/ui/1.12.1/jquery-ui.js
124871
45020
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_6HfUi4GwIIk_CNvqMS-1vWfrcpyqM5nFob0M71Yj-dA.js
96698
26927
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMerged.js?1637631067810&_=1637631067665
61612
14439
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
60542
8460
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_2CV_tf0x9FSEhAGEQbwQkSfpRzLZrvFU1Y67WrDT2g0.js
15538
6683
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MT2QBbybs-1DtknsbwaM-hCSDAAIiJlHCKMsxinWS2s.js
36253
3928
Efficiently encode images — Potential savings of 24 KiB
Unoptimized images can consume more cellular data than what is necessary.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://www.flutter.com/sites/paddy-power-betfair/files/2020-03/LSE_Flutter_052.jpg
161498
24444
Enable text compression — Potential savings of 12 KiB
Text-based resources should be served with compression, such as gzip, deflate or brotli.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://edge.api.brightcove.com/playback/v1/accounts/1555966121001/videos?q=tags%3Abetair&sort=reference_id&limit=50&offset=0
15193
12697
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Avoid multiple page redirects — Potential savings of 190 ms
Redirects can cause additional delays before the page can begin loading. Flutter.com should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
http://flutter.com/
190
https://www.flutter.com/
0
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Flutter.com should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles
Ensure that no duplicate JavaScript modules from bundles exist to reduce bytes consumed by network activity.
Avoid serving legacy JavaScript to modern browsers
Polyfills and transforms enable legacy browsers to use new JavaScript features. For bundled JavaScript it is recommended to adopt a modern script deployment strategy using module/nomodule feature detection. This will reduce the amount of code shipped to modern browsers.
Preload Largest Contentful Paint image
It is recommended to preload images used by LCP elements, to improve LCP time.
Avoids an excessive DOM size — 677 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
677
Maximum DOM Depth
27
Maximum Child Elements
14
Avoid chaining critical requests — 16 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Flutter.com should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
JavaScript execution time — 0.1 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://www.flutter.com/
1268.397
5.888
2.561
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
185.261
130.429
3.454
Unattributable
135.128
3.421
0.176
Minimizes main-thread work — 1.8 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Style & Layout
507.457
Other
465.789
Rendering
462.48200000001
Script Evaluation
255.472
Parse HTML & CSS
72.409
Script Parsing & Compilation
39.609
Garbage Collection
7.122
Keep request counts low and transfer sizes small — 52 requests • 7,143 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
52
7314323
Image
19
6427643
Script
12
490672
Font
6
202776
Stylesheet
8
158112
Other
5
19203
Document
2
15917
Media
0
0
Third-party
25
440733
Minimize third-party usage — Third-party code blocked the main thread for 0 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
128473
0
124871
0
74962
0
44427
0
21841
0
17461
0
16758
0
11118
0
Lazy load third-party resources with facades
Consider replacing third-party embeds with a facade until they are required (use lazy loading).
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
Largest Contentful Paint image was not lazily loaded
Above-the-fold images that are lazily loaded render later in the page lifecycle, which can delay the largest contentful paint.
Element
Avoid large layout shifts — 4 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element CLS Contribution
0.00030994786990179
0.00012994356156787
0.00010997576485613
6.778380475409E-5
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks — 2 long tasks found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.
URL Start Time (Ms) Duration (Ms)
https://www.flutter.com/
650
78
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
1670
59
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of flutter.com on mobile screens.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Metrics

First Contentful Paint — 1.2 s
The time taken for the first image or text on the page to be rendered.

Audits

First Meaningful Paint — 1.4 s
The time taken for the primary content of the page to be rendered.

Other

Eliminate render-blocking resources — Potential savings of 530 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Flutter.com should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_zLo3j1_-BMKD8nuPRn3Qwp6Ckd5TlypCoxlUf3m_Ezk.css?qucnxq
47506
230
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_SDs14ESsrvvU79cAx4bfHfcJEsbEdLvHhphDuD0MpiU.css?qucnxq
97884
350
https://cdnjs.cloudflare.com/ajax/libs/Swiper/3.4.1/css/swiper.min.css
3590
230
Reduce unused CSS — Potential savings of 133 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Flutter.com should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_SDs14ESsrvvU79cAx4bfHfcJEsbEdLvHhphDuD0MpiU.css?qucnxq
97884
90567
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_zLo3j1_-BMKD8nuPRn3Qwp6Ckd5TlypCoxlUf3m_Ezk.css?qucnxq
47506
46002
Reduce unused JavaScript — Potential savings of 285 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://code.jquery.com/ui/1.12.1/jquery-ui.js
124871
104877
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_6HfUi4GwIIk_CNvqMS-1vWfrcpyqM5nFob0M71Yj-dA.js
96698
85906
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMerged.js?1637631067810&_=1637631067665
61612
51599
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
60542
27252
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MT2QBbybs-1DtknsbwaM-hCSDAAIiJlHCKMsxinWS2s.js
36253
22373

Metrics

Speed Index — 4.8 s
The time taken for the page contents to be visibly populated.
Largest Contentful Paint — 3.2 s
The timing of the largest text or image that is painted.

Other

Serve images in next-gen formats — Potential savings of 5,811 KiB
Consider JPEG 2000, JPEG XR or WebP image formats which provide better compression than PNG and JPEG.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://www.flutter.com/sites/paddy-power-betfair/files/stadium.png
1873191
1792592.15
https://www.flutter.com/sites/paddy-power-betfair/files/banner-images/Header%20Image%203.png
1776280
1697555.9
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/careers.png
1013258
993516.75
https://www.flutter.com/sites/paddy-power-betfair/files/custom%20%E2%80%93%201_0.png
457045
418101.55
https://www.flutter.com/sites/paddy-power-betfair/files/homepage%20CSR.png
347178
333131.1
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/result-1.png
281055
259038
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/our_business_menu.png
124091
111168.1
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/Hartley_Betfair07911.png
109869
99484.55
https://www.flutter.com/sites/paddy-power-betfair/files/2020-03/LSE_Flutter_052.jpg
161498
96457.7
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/f-graphic.png
66720
50746.9
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
21866
19339.4
https://www.flutter.com/modules/contrib/we_megamenu/assets/images/ico-arrow.png
18792
18496.85
https://www.flutter.com/modules/contrib/we_megamenu/assets/images/ico-arrow-white.png
18530
18291.2
https://www.flutter.com/sites/paddy-power-betfair/files/pride_bus_meganav%20(1).jpg
38537
15303.6
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/cross-overlay.png
30574
14571.95
https://www.flutter.com/sites/paddy-power-betfair/files/media_meganav.jpg
28687
12260.65
Reduce initial server response time — Root document took 3,250 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
URL Time Spent (Ms)
https://www.flutter.com/
3248.786
Avoid enormous network payloads — Total size was 7,143 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://www.flutter.com/sites/paddy-power-betfair/files/stadium.png
1873545
https://www.flutter.com/sites/paddy-power-betfair/files/banner-images/Header%20Image%203.png
1776634
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/careers.png
1013611
https://www.flutter.com/sites/paddy-power-betfair/files/custom%20%E2%80%93%201_0.png
457396
https://www.flutter.com/sites/paddy-power-betfair/files/homepage%20CSR.png
347529
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/result-1.png
281408
https://www.flutter.com/sites/paddy-power-betfair/files/2020-03/LSE_Flutter_052.jpg
161852
https://code.jquery.com/ui/1.12.1/jquery-ui.js
124871
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/our_business_menu.png
124443
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/Hartley_Betfair07911.png
110221
Serve static assets with an efficient cache policy — 30 resources found
Flutter.com can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMerged.js?1637631067810&_=1637631067665
0
61612
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/css/videoplayer.css
0
5949
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMainConfig.js
0
2629
https://www.google-analytics.com/analytics.js
7200000
20631
https://www.flutter.com/sites/paddy-power-betfair/files/new-logo/logo.svg
40643000
1686
https://www.flutter.com/sites/paddy-power-betfair/files/pride_bus_meganav%20(1).jpg
41200000
38887
https://www.flutter.com/sites/paddy-power-betfair/files/homepage%20CSR.png
44652000
347529
https://www.flutter.com/sites/paddy-power-betfair/files/custom%20%E2%80%93%201_0.png
71540000
457396
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/f-graphic.png
93399000
67070
https://www.flutter.com/themes/investis_bootstrap_t2/Fonts/fontawesome-webfont.woff2?v=4.7.0
117962000
77486
https://www.flutter.com/sites/paddy-power-betfair/files/stadium.png
259098000
1873545
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
388553000
60542
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_SDs14ESsrvvU79cAx4bfHfcJEsbEdLvHhphDuD0MpiU.css?qucnxq
406440000
97884
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/Hartley_Betfair07911.png
429316000
110221
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/our_business_menu.png
431484000
124443
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_zLo3j1_-BMKD8nuPRn3Qwp6Ckd5TlypCoxlUf3m_Ezk.css?qucnxq
442811000
47506
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_6HfUi4GwIIk_CNvqMS-1vWfrcpyqM5nFob0M71Yj-dA.js
450085000
96698
https://www.flutter.com/modules/contrib/we_megamenu/assets/images/ico-arrow-white.png
460140000
18880
https://www.flutter.com/sites/paddy-power-betfair/files/media_meganav.jpg
486246000
29038
https://p.typekit.net/p.css?s=1&k=esq0mqz&ht=tk&f=9785.9786.9787.9788.9789.9790.9791.9792.9793.9794&a=643807&app=typekit&e=css
604800000
317
https://p.typekit.net/p.css?s=1&k=xlo7mwe&ht=tk&f=9785.9786.9787.9789.9791.9792&a=643807&app=typekit&e=css
604800000
317
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/careers.png
752904000
1013611
https://www.flutter.com/modules/contrib/we_megamenu/assets/images/ico-arrow.png
795115000
19142
https://www.flutter.com/sites/paddy-power-betfair/files/banner-images/Header%20Image%203.png
819890000
1776634
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
828465000
22216
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_2CV_tf0x9FSEhAGEQbwQkSfpRzLZrvFU1Y67WrDT2g0.js
944783000
15538
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/result-1.png
1080601000
281408
https://www.flutter.com/sites/paddy-power-betfair/files/2020-03/LSE_Flutter_052.jpg
1117484000
161852
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/cross-overlay.png
1147023000
30925
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MT2QBbybs-1DtknsbwaM-hCSDAAIiJlHCKMsxinWS2s.js
1209600000
36253
Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://use.typekit.net/af/5c84c3/00000000000000000001787b/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3
36.30100004375
https://www.flutter.com/themes/investis_bootstrap_t2/Fonts/fontawesome-webfont.woff2?v=4.7.0
2815.4680000152
https://use.typekit.net/af/d82207/000000000000000000017879/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n3&v=3
31.764999963343
https://use.typekit.net/af/946b62/00000000000000000001787f/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3
46.164000174031
https://use.typekit.net/af/5ea570/00000000000000000001787d/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n5&v=3
349.9539999757
https://use.typekit.net/af/5c84c3/00000000000000000001787b/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3
23.830000078306
Does not use passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Source
Image elements do not have explicit `width` and `height`
Reduce layout shifts and improve CLS by setting explicit width and height properties on image elements.
URL
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
https://www.flutter.com/sites/paddy-power-betfair/files/new-logo/logo.svg
https://www.flutter.com/sites/paddy-power-betfair/files/new-logo/logo.svg
88

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of flutter.com. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`button`, `link`, and `menuitem` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
ARIA `meter` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
ARIA `progressbar` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
ARIA `tooltip` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
ARIA `treeitem` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Flutter.com may provide assistance to deaf or hearing-impaired users with captions on videos.

Contrast

Background and foreground colors do not have a sufficient contrast ratio.
Many (if not most) users find low-contrast text difficult or impossible to read.
Failing Elements

Navigation

Heading elements are not in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
Failing Elements

Names and labels

Links do not have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.

Best practices

`[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.
Failing Elements

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
69

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that flutter.com should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Ensure CSP is effective against XSS attacks
Significantly reduce the risk of cross-site scripting attacks (XSS) by ensuring you have a strong Content Security Policy (CSP).
Description Directive Severity
No CSP found in enforcement mode
High

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
Fonts with `font-display: optional` are preloaded
It is recommended that optional fonts are preloaded.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids `unload` event listeners
The 'unload' event does not fire reliably, causing issues with browser optimizations such as the Back-Forward Cache. It is recommended that 'pagehide' or 'visibilitychange' events are used instead.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
jQuery
3.2.1
jQuery UI
1.12.1
Underscore
1.8.3
Handlebars
1.0.0
Drupal
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
No issues in the `Issues` panel in Chrome Devtools
There may be unresolved issues logged to Chrome Devtools.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL Request Resolution
http://flutter.com/
Allowed
Includes front-end JavaScript libraries with known security vulnerabilities — 12 vulnerabilities detected
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.
Library Version Vulnerability Count Highest Severity
3
Medium
1
Medium
8
High

Audits

Displays images with incorrect aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
URL Aspect Ratio (Displayed) Aspect Ratio (Actual)
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
300 x 157 (1.91)
360 x 227 (1.59)
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
300 x 157 (1.91)
360 x 227 (1.59)
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
300 x 157 (1.91)
360 x 227 (1.59)

Audits

Browser errors were logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
Source Description
Failed to load resource: the server responded with a status of 404 (Not Found)
Missing source maps for large first-party JavaScript
Consider deploying source maps for added benefits such as the ability to debug while in production.
URL Map URL
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_6HfUi4GwIIk_CNvqMS-1vWfrcpyqM5nFob0M71Yj-dA.js
83

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for flutter.com. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of flutter.com on mobile screens.
Document uses legible font sizes
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Tap targets are sized appropriately
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Content Best Practices

Links do not have descriptive text — 9 links found
Make use of descriptive link text to assist search engines in understanding the content.

Crawling and Indexing

Links are not crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
22

PWA

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of flutter.com. This includes details about web app manifests.

PWA Optimized

Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of flutter.com on mobile screens.

Installable

Web app manifest or service worker do not meet the installability requirements — 1 reason
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
Failure reason
No manifest was fetched

PWA Optimized

Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Avg. (All Categories) 60
Performance 31
Accessibility 88
Best Practices 69
SEO 82
PWA 30
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://www.flutter.com/
Updated: 23rd November, 2021

3.48 seconds
First Contentful Paint (FCP)
46%
22%
32%

0.02 seconds
First Input Delay (FID)
94%
5%
1%

Simulate loading on mobile
31

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for flutter.com. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Cumulative Layout Shift — 0
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

Properly size images
Images can slow down the page's load time. Flutter.com should consider serving more appropriate-sized images.
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Flutter.com should consider minifying CSS files.
Enable text compression — Potential savings of 12 KiB
Text-based resources should be served with compression, such as gzip, deflate or brotli.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://edge.api.brightcove.com/playback/v1/accounts/1555966121001/videos?q=tags%3Abetair&sort=reference_id&limit=50&offset=0
15193
12697
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 280 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
URL Time Spent (Ms)
https://www.flutter.com/
279.454
Avoid multiple page redirects — Potential savings of 630 ms
Redirects can cause additional delays before the page can begin loading. Flutter.com should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
http://flutter.com/
630
https://www.flutter.com/
0
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Flutter.com should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles
Ensure that no duplicate JavaScript modules from bundles exist to reduce bytes consumed by network activity.
Avoid serving legacy JavaScript to modern browsers
Polyfills and transforms enable legacy browsers to use new JavaScript features. For bundled JavaScript it is recommended to adopt a modern script deployment strategy using module/nomodule feature detection. This will reduce the amount of code shipped to modern browsers.
Preload Largest Contentful Paint image
It is recommended to preload images used by LCP elements, to improve LCP time.
Avoids an excessive DOM size — 729 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
729
Maximum DOM Depth
27
Maximum Child Elements
14
Avoid chaining critical requests — 16 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Flutter.com should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
Keep request counts low and transfer sizes small — 54 requests • 7,108 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
54
7278778
Image
17
6389621
Script
13
489664
Font
6
202777
Stylesheet
10
159638
Other
5
19211
Document
3
17867
Media
0
0
Third-party
29
443621
Minimize third-party usage — Third-party code blocked the main thread for 200 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
44425
106.404
21841
82.1
124871
11.328
129983
0
76318
0
17469
0
16774
0
11118
0
Lazy load third-party resources with facades
Consider replacing third-party embeds with a facade until they are required (use lazy loading).
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
Largest Contentful Paint image was not lazily loaded
Above-the-fold images that are lazily loaded render later in the page lifecycle, which can delay the largest contentful paint.
Element
Avoid large layout shifts — 1 element found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element CLS Contribution
0.00046375910441081
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks — 17 long tasks found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.
URL Start Time (Ms) Duration (Ms)
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
7140
551
https://www.flutter.com/
1669
394
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_SDs14ESsrvvU79cAx4bfHfcJEsbEdLvHhphDuD0MpiU.css?qucnxq
4170
298
https://www.googletagmanager.com/gtm.js?id=GTM-WZ7GBGW
10110
159
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_zLo3j1_-BMKD8nuPRn3Qwp6Ckd5TlypCoxlUf3m_Ezk.css?qucnxq
2940
145
https://www.google-analytics.com/analytics.js
10859
145
https://www.flutter.com/
736
141
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_6HfUi4GwIIk_CNvqMS-1vWfrcpyqM5nFob0M71Yj-dA.js
9779
122
https://www.flutter.com/
2223
100
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
9923
90
Unattributable
877
88
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMerged.js?1637631105673&_=1637631104483
11004
67
https://www.flutter.com/
2063
65
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
10014
59
https://www.flutter.com/
1611
58
https://www.flutter.com/
1560
51
https://www.flutter.com/
2128
51
Avoid non-composited animations — 2 animated elements found
It is recommended to avoid non-composited animations which are often janky and increase CLS.
Element Name
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of flutter.com on mobile screens.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Audits

Network Requests
Below is a list of network requests that were made during page load.
URL Protocol Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://flutter.com/
http/1.1
0
199.3740000762
307
0
301
text/html
https://www.flutter.com/
http/1.1
199.81599994935
478.27699990012
14330
68235
200
text/html
Document
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_zLo3j1_-BMKD8nuPRn3Qwp6Ckd5TlypCoxlUf3m_Ezk.css?qucnxq
http/1.1
503.86400008574
641.15700009279
47506
301752
200
text/css
Stylesheet
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_SDs14ESsrvvU79cAx4bfHfcJEsbEdLvHhphDuD0MpiU.css?qucnxq
http/1.1
504.10900008865
720.29899992049
97884
767726
200
text/css
Stylesheet
https://cdnjs.cloudflare.com/ajax/libs/Swiper/3.4.1/css/swiper.min.css
h2
504.20500012115
528.67099992
3606
17762
200
text/css
Stylesheet
https://www.flutter.com/sites/paddy-power-betfair/files/new-logo/logo.svg
http/1.1
512.50399998389
613.40399994515
1687
3100
200
image/svg+xml
Image
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/our_business_menu.png
http/1.1
512.90299999528
3513.2760000415
124442
124091
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/Hartley_Betfair07911.png
http/1.1
513.001000043
680.488999933
110221
109869
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/pride_bus_meganav%20(1).jpg
http/1.1
513.09400005266
685.36900007166
38888
38537
200
image/jpeg
Image
https://www.flutter.com/sites/paddy-power-betfair/files/media_meganav.jpg
http/1.1
513.17799999379
686.04200007394
29038
28687
200
image/jpeg
Image
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
http/1.1
513.25600012206
681.13799998537
22216
21866
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
http/1.1
513.3499999065
2197.2829999868
60542
191085
200
text/javascript
Script
https://cdn.jsdelivr.net/bootstrap/3.3.7/js/bootstrap.min.js
h2
513.44399992377
551.27599998377
11118
37045
200
application/javascript
Script
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_2CV_tf0x9FSEhAGEQbwQkSfpRzLZrvFU1Y67WrDT2g0.js
http/1.1
513.52400006726
641.90699998289
15538
65501
200
text/javascript
Script
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMainConfig.js
http/1.1
513.63199995831
745.83399994299
2218
6886
200
text/javascript
Script
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MT2QBbybs-1DtknsbwaM-hCSDAAIiJlHCKMsxinWS2s.js
http/1.1
513.72299995273
657.46699995361
35842
133889
200
text/javascript
Script
https://code.jquery.com/ui/1.12.1/jquery-ui.js
h2
517.21499999985
595.55700002238
124871
520714
200
application/javascript
Script
https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/1.0.0/handlebars.min.js
h2
517.37300003879
552.39000008442
13168
50170
200
application/javascript
Script
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_6HfUi4GwIIk_CNvqMS-1vWfrcpyqM5nFob0M71Yj-dA.js
http/1.1
517.45099993423
3367.5160000566
96697
521106
200
text/javascript
Script
https://use.typekit.net/esq0mqz.css
h2
742.10099992342
839.05500010587
1356
7213
200
text/css
Stylesheet
https://p.typekit.net/p.css?s=1&k=esq0mqz&ht=tk&f=9785.9786.9787.9788.9789.9790.9791.9792.9793.9794&a=643807&app=typekit&e=css
h2
843.45100005157
870.26700004935
317
5
200
text/css
Stylesheet
https://irs.tools.investis.com/clients/uk/flutter-paddy-power/Ticker/ticker_head.aspx?culture=en-GB
http/1.1
883.72800010256
1004.874000093
1590
2620
200
text/html
Document
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/f-graphic.png
http/1.1
950.01700008288
1917.5970000215
67070
66720
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/result-1.png
http/1.1
954.84700007364
1133.0329999328
281407
281055
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/2020-03/LSE_Flutter_052.jpg
http/1.1
955.00200008973
2550.9349999484
161850
161498
200
image/jpeg
Image
https://www.flutter.com/sites/paddy-power-betfair/files/homepage%20CSR.png
http/1.1
963.97299994715
3051.9540000241
347531
347178
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/custom%20%E2%80%93%201_0.png
http/1.1
964.154999936
4016.7479999363
457398
457045
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/cross-overlay.png
http/1.1
964.27499991842
3007.7539999038
30924
30574
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/careers.png
http/1.1
964.38100002706
1211.0250000842
1013611
1013258
200
image/png
Image
https://use.typekit.net/af/5c84c3/00000000000000000001787b/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3
h2
973.1159999501
1325.887999963
24686
24368
200
application/font-woff2
Font
https://www.flutter.com/themes/investis_bootstrap_t2/Fonts/fontawesome-webfont.woff2?v=4.7.0
http/1.1
973.345000064
3260.0209999364
77487
77160
200
application/octet-stream
Font
https://use.typekit.net/af/d82207/000000000000000000017879/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n3&v=3
h2
973.44200010411
1320.5969999544
26502
26184
200
application/font-woff2
Font
https://use.typekit.net/af/946b62/00000000000000000001787f/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3
h2
973.59400009736
1004.2030001059
24022
23704
200
application/font-woff2
Font
https://use.typekit.net/af/5ea570/00000000000000000001787d/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n5&v=3
h2
973.70600001886
1004.6640001237
25394
25076
200
application/font-woff2
Font
https://use.typekit.net/xlo7mwe.css
h2
1164.2470001243
1263.116999995
1193
4537
200
text/css
Stylesheet
https://irs.tools.investis.com/clients/default/scripts/iframeResizer_child_v2.js
http/1.1
1164.3240000121
2959.0370000806
3185
6576
200
application/x-javascript
Script
https://p.typekit.net/p.css?s=1&k=xlo7mwe&ht=tk&f=9785.9786.9787.9789.9791.9792&a=643807&app=typekit&e=css
h2
1266.5450000204
1292.2779999208
317
5
200
text/css
Stylesheet
https://geoid.investisdigital.com/
http/1.1
2283.0940000713
2558.8330000173
822
22
200
text/html
XHR
https://www.googletagmanager.com/gtm.js?id=GTM-WZ7GBGW
h2
2567.6370000001
2586.8949999567
44425
116154
200
application/javascript
Script
https://www.google-analytics.com/analytics.js
h2
2619.2489999812
2625.7319999859
20631
50205
200
text/javascript
Script
https://www.google-analytics.com/j/collect?v=1&_v=j96&a=31747565&t=pageview&_s=1&dl=https%3A%2F%2Fwww.flutter.com%2F&ul=en-us&de=UTF-8&dt=Flutter%E2%84%A2%20%C2%BB%20Providing%20Global%20Sports%20Betting%2C%20Gaming%20%26%20Entertainment&sd=24-bit&sr=360x640&vp=360x640&je=0&_u=YEBAAAABAAAAAC~&jid=718640234&gjid=129555545&cid=1697324427.1637631105&tid=UA-18193182-3&_gid=306505808.1637631105&_r=1&gtm=2wgba1WZ7GBGW&z=285219795
h2
2669.7549999226
2674.5899999514
613
1
200
text/plain
XHR
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMerged.js?1637631105673&_=1637631104483
http/1.1
3432.802000083
3613.8110000174
61201
348951
200
text/javascript
Script
https://www.flutter.com/sites/paddy-power-betfair/files/banner-images/Header%20Image%203.png
http/1.1
3452.3030000273
3639.2240000423
1776634
1776280
200
image/png
Image
https://www.flutter.com/sites/paddy-power-betfair/files/stadium.png
http/1.1
3452.4290000554
6018.2270000223
1873544
1873191
200
image/png
Image
https://www.flutter.com/undefined
http/1.1
3497.2510000225
3743.1220000144
52563
51423
404
text/html
Image
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/css/videoplayer.css
http/1.1
3642.3869999126
5720.6129999831
5949
36048
200
text/css
Stylesheet
https://irs.tools.investis.com/clients/uk/flutter-paddy-power/Ticker/ticker_head.aspx?culture=en-GB
http/1.1
3717.3409999814
5336.4969999529
1947
2620
200
text/html
Document
https://edge.api.brightcove.com/playback/v1/accounts/1555966121001/videos?q=tags%3Abetair&sort=reference_id&limit=50&offset=0
h2
3915.069000097
3997.2139999736
16481
15193
200
application/json
XHR
https://edge.api.brightcove.com/playback/v1/accounts/1555966121001/videos?q=tags%3Abetair&sort=reference_id&limit=50&offset=0
h2
3893.7270001043
3914.4210000522
988
0
200
Preflight
https://use.typekit.net/xlo7mwe.css
h2
5349.2010000627
5349.3409999646
1193
4537
200
text/css
Stylesheet
https://irs.tools.investis.com/clients/default/scripts/iframeResizer_child_v2.js
http/1.1
5355.7830001228
5504.5169999357
228
6576
304
application/x-javascript
Script
https://p.typekit.net/p.css?s=1&k=xlo7mwe&ht=tk&f=9785.9786.9787.9789.9791.9792&a=643807&app=typekit&e=css
h2
5350.3370000981
5350.4329998977
317
5
200
text/css
Stylesheet
https://use.typekit.net/af/5c84c3/00000000000000000001787b/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3
h2
5358.203999931
5698.7199999858
24686
24368
200
application/font-woff2
Font
https://www.google-analytics.com/collect?v=1&_v=j96&a=31747565&t=event&ni=1&_s=1&dl=https%3A%2F%2Fwww.flutter.com%2F&ul=en-us&de=UTF-8&dt=Flutter%E2%84%A2%20%C2%BB%20Providing%20Global%20Sports%20Betting%2C%20Gaming%20%26%20Entertainment&sd=24-bit&sr=360x640&vp=360x640&je=0&ec=Scroll%20Tracking&ea=%2F&el=0%25&_u=aEDAAAABAAAAAC~&jid=&gjid=&cid=1697324427.1637631105&tid=UA-18193182-3&_gid=306505808.1637631105&gtm=2wgba1WZ7GBGW&z=773897248
h2
6116.0909999162
6470.0650000013
597
35
200
image/gif
Image
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
536.633
12.746
553.48
7.058
697.375
36.343
734.022
5.829
781.223
74.492
855.787
10.772
893.203
5.71
925.846
14.479
940.343
196.881
1140.881
12.087
1152.981
11.286
1164.283
32.48
1199.882
12.834
1390.251
22.189
2058.363
9.045
2265.378
137.63
2403.026
6.209
2607.177
6.745
2613.943
8.836
2623.523
7.217
2651.976
8.953
2661.713
10.627
2685.908
36.309
3314.496
5.388
3323.394
5.622
3436.282
30.499
3466.827
8.678
3487.561
44.87
3678.462
16.792
3731.308
29.686
3761.009
35.15
5394.076
6.571
5409.515
5.827
5790.205
7.262
6078.007
16.973
6095.034
25.015
6129.412
39.739
8266.597
22.063
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data
Script Treemap Data
Provide as required, for treemap app.

Other

Defer offscreen images — Potential savings of 242 KiB
Time to Interactive can be slowed down by resources on the page. Flutter.com should consider lazy-loading offscreen and hidden images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/our_business_menu.png
124091
124091
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/Hartley_Betfair07911.png
109869
109869
https://www.flutter.com/
14330
14330
Minify JavaScript — Potential savings of 103 KiB
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Flutter.com should consider minifying JS files.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://code.jquery.com/ui/1.12.1/jquery-ui.js
124871
45020
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_6HfUi4GwIIk_CNvqMS-1vWfrcpyqM5nFob0M71Yj-dA.js
96697
26927
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMerged.js?1637631105673&_=1637631104483
61201
14343
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
60542
8460
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_2CV_tf0x9FSEhAGEQbwQkSfpRzLZrvFU1Y67WrDT2g0.js
15538
6683
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MT2QBbybs-1DtknsbwaM-hCSDAAIiJlHCKMsxinWS2s.js
35842
3884
Efficiently encode images — Potential savings of 24 KiB
Unoptimized images can consume more cellular data than what is necessary.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://www.flutter.com/sites/paddy-power-betfair/files/2020-03/LSE_Flutter_052.jpg
161498
24444
Reduce JavaScript execution time — 1.4 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://www.flutter.com/
2499.724
16.044
26.016
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
698.896
518.94
14.076
Unattributable
554.6
10.468
0.592
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_SDs14ESsrvvU79cAx4bfHfcJEsbEdLvHhphDuD0MpiU.css?qucnxq
297.968
0
0
https://www.googletagmanager.com/gtm.js?id=GTM-WZ7GBGW
261.116
238.988
7.54
https://www.google-analytics.com/analytics.js
152.392
137.396
6.748
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_zLo3j1_-BMKD8nuPRn3Qwp6Ckd5TlypCoxlUf3m_Ezk.css?qucnxq
145.372
0
0
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_2CV_tf0x9FSEhAGEQbwQkSfpRzLZrvFU1Y67WrDT2g0.js
143.272
133.1
4.9
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MT2QBbybs-1DtknsbwaM-hCSDAAIiJlHCKMsxinWS2s.js
137.952
67.912
8.284
https://irs.tools.investis.com/clients/uk/flutter-paddy-power/Ticker/ticker_head.aspx?culture=en-GB
121.032
14.272
8.668
https://code.jquery.com/ui/1.12.1/jquery-ui.js
101.972
61.884
39.576
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_6HfUi4GwIIk_CNvqMS-1vWfrcpyqM5nFob0M71Yj-dA.js
87.232
25.376
37.048
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMerged.js?1637631105673&_=1637631104483
54.456
8.408
28.172

Metrics

First Contentful Paint — 4.6 s
The time taken for the first image or text on the page to be rendered.
Time to Interactive — 10.5 s
The time taken for the page to become fully interactive.
Speed Index — 9.2 s
The time taken for the page contents to be visibly populated.
Total Blocking Time — 800 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Largest Contentful Paint — 23.7 s
The timing of the largest text or image that is painted.

Audits

Max Potential First Input Delay — 550 ms
Users could experience a delay when interacting with the page.
First Meaningful Paint — 4.7 s
The time taken for the primary content of the page to be rendered.

Other

Eliminate render-blocking resources — Potential savings of 2,490 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Flutter.com should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
URL Transfer Size (Bytes) Potential Savings (Ms)
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_zLo3j1_-BMKD8nuPRn3Qwp6Ckd5TlypCoxlUf3m_Ezk.css?qucnxq
47506
1080
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_SDs14ESsrvvU79cAx4bfHfcJEsbEdLvHhphDuD0MpiU.css?qucnxq
97884
1530
https://cdnjs.cloudflare.com/ajax/libs/Swiper/3.4.1/css/swiper.min.css
3606
780
Reduce unused CSS — Potential savings of 133 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Flutter.com should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_SDs14ESsrvvU79cAx4bfHfcJEsbEdLvHhphDuD0MpiU.css?qucnxq
97884
89808
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_zLo3j1_-BMKD8nuPRn3Qwp6Ckd5TlypCoxlUf3m_Ezk.css?qucnxq
47506
45973
Reduce unused JavaScript — Potential savings of 285 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://code.jquery.com/ui/1.12.1/jquery-ui.js
124871
104877
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_6HfUi4GwIIk_CNvqMS-1vWfrcpyqM5nFob0M71Yj-dA.js
96697
85905
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMerged.js?1637631105673&_=1637631104483
61201
51255
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
60542
27283
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MT2QBbybs-1DtknsbwaM-hCSDAAIiJlHCKMsxinWS2s.js
35842
22119
Serve images in next-gen formats — Potential savings of 5,775 KiB
Consider JPEG 2000, JPEG XR or WebP image formats which provide better compression than PNG and JPEG.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://www.flutter.com/sites/paddy-power-betfair/files/stadium.png
1873191
1792592.15
https://www.flutter.com/sites/paddy-power-betfair/files/banner-images/Header%20Image%203.png
1776280
1697555.9
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/careers.png
1013258
993516.75
https://www.flutter.com/sites/paddy-power-betfair/files/custom%20%E2%80%93%201_0.png
457045
418101.55
https://www.flutter.com/sites/paddy-power-betfair/files/homepage%20CSR.png
347178
333131.1
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/result-1.png
281055
259038
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/our_business_menu.png
124091
111168.1
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/Hartley_Betfair07911.png
109869
99484.55
https://www.flutter.com/sites/paddy-power-betfair/files/2020-03/LSE_Flutter_052.jpg
161498
96457.7
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/f-graphic.png
66720
50746.9
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
21866
19339.4
https://www.flutter.com/sites/paddy-power-betfair/files/pride_bus_meganav%20(1).jpg
38537
15303.6
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/cross-overlay.png
30574
14571.95
https://www.flutter.com/sites/paddy-power-betfair/files/media_meganav.jpg
28687
12260.65
Avoid enormous network payloads — Total size was 7,108 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://www.flutter.com/sites/paddy-power-betfair/files/stadium.png
1873544
https://www.flutter.com/sites/paddy-power-betfair/files/banner-images/Header%20Image%203.png
1776634
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/careers.png
1013611
https://www.flutter.com/sites/paddy-power-betfair/files/custom%20%E2%80%93%201_0.png
457398
https://www.flutter.com/sites/paddy-power-betfair/files/homepage%20CSR.png
347531
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/result-1.png
281407
https://www.flutter.com/sites/paddy-power-betfair/files/2020-03/LSE_Flutter_052.jpg
161850
https://code.jquery.com/ui/1.12.1/jquery-ui.js
124871
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/our_business_menu.png
124442
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/Hartley_Betfair07911.png
110221
Serve static assets with an efficient cache policy — 29 resources found
Flutter.com can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMerged.js?1637631105673&_=1637631104483
0
61201
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/css/videoplayer.css
0
5949
https://viz.tools.investis.com/video/videoPlayer-v.2.0-latest/betair/js/videoMainConfig.js
0
2218
https://www.google-analytics.com/analytics.js
7200000
20631
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_6HfUi4GwIIk_CNvqMS-1vWfrcpyqM5nFob0M71Yj-dA.js
42947000
96697
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/our_business_menu.png
43005000
124442
https://www.flutter.com/sites/paddy-power-betfair/files/stadium.png
46763000
1873544
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/f-graphic.png
93365000
67070
https://www.flutter.com/sites/paddy-power-betfair/files/2020-03/LSE_Flutter_052.jpg
97743000
161850
https://www.flutter.com/sites/paddy-power-betfair/files/megamenu/Hartley_Betfair07911.png
237716000
110221
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/cross-overlay.png
298924000
30924
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_SDs14ESsrvvU79cAx4bfHfcJEsbEdLvHhphDuD0MpiU.css?qucnxq
406405000
97884
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MbjECeptA-7Qcsb7vDUdr6tHDyXlumcsmVkMIPv1xxU.js
420419000
60542
https://www.flutter.com/sites/paddy-power-betfair/files/css/css_zLo3j1_-BMKD8nuPRn3Qwp6Ckd5TlypCoxlUf3m_Ezk.css?qucnxq
442776000
47506
https://www.flutter.com/sites/paddy-power-betfair/files/new-logo/logo.svg
446513000
1687
https://www.flutter.com/sites/paddy-power-betfair/files/pride_bus_meganav%20(1).jpg
462649000
38888
https://www.flutter.com/sites/paddy-power-betfair/files/media_meganav.jpg
486224000
29038
https://p.typekit.net/p.css?s=1&k=esq0mqz&ht=tk&f=9785.9786.9787.9788.9789.9790.9791.9792.9793.9794&a=643807&app=typekit&e=css
604800000
317
https://p.typekit.net/p.css?s=1&k=xlo7mwe&ht=tk&f=9785.9786.9787.9789.9791.9792&a=643807&app=typekit&e=css
604800000
317
https://p.typekit.net/p.css?s=1&k=xlo7mwe&ht=tk&f=9785.9786.9787.9789.9791.9792&a=643807&app=typekit&e=css
604800000
317
https://www.flutter.com/sites/paddy-power-betfair/themes/project_bootstrap/images/careers.png
752912000
1013611
https://www.flutter.com/sites/paddy-power-betfair/files/banner-images/Header%20Image%203.png
819852000
1776634
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
828374000
22216
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_2CV_tf0x9FSEhAGEQbwQkSfpRzLZrvFU1Y67WrDT2g0.js
944748000
15538
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/result-1.png
998154000
281407
https://www.flutter.com/sites/paddy-power-betfair/files/homepage%20CSR.png
1113769000
347531
https://www.flutter.com/sites/paddy-power-betfair/files/custom%20%E2%80%93%201_0.png
1145587000
457398
https://www.flutter.com/themes/investis_bootstrap_t2/Fonts/fontawesome-webfont.woff2?v=4.7.0
1207762000
77487
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_MT2QBbybs-1DtknsbwaM-hCSDAAIiJlHCKMsxinWS2s.js
1209600000
35842
Minimize main-thread work — 5.3 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Other
1602.072
Script Evaluation
1256.244
Style & Layout
969.196
Rendering
668.19600000001
Parse HTML & CSS
632.432
Script Parsing & Compilation
192.408
Garbage Collection
16.8
Ensure text remains visible during webfont load
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
URL Potential Savings (Ms)
https://use.typekit.net/af/5c84c3/00000000000000000001787b/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3
352.77200001292
https://www.flutter.com/themes/investis_bootstrap_t2/Fonts/fontawesome-webfont.woff2?v=4.7.0
2286.6759998724
https://use.typekit.net/af/d82207/000000000000000000017879/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n3&v=3
347.15499985032
https://use.typekit.net/af/946b62/00000000000000000001787f/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3
30.609000008553
https://use.typekit.net/af/5ea570/00000000000000000001787d/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n5&v=3
30.958000104874
https://use.typekit.net/af/5c84c3/00000000000000000001787b/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3
340.51600005478
Does not use passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Source
Image elements do not have explicit `width` and `height`
Reduce layout shifts and improve CLS by setting explicit width and height properties on image elements.
URL
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
https://www.flutter.com/sites/paddy-power-betfair/files/new-logo/logo.svg
First Contentful Paint (3G) — 9615 ms
The time taken for the first image or text on the page to be rendered while on a 3G network.
88

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of flutter.com. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`button`, `link`, and `menuitem` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
ARIA `meter` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
ARIA `progressbar` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
ARIA `tooltip` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
ARIA `treeitem` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Flutter.com may provide assistance to deaf or hearing-impaired users with captions on videos.

Contrast

Background and foreground colors do not have a sufficient contrast ratio.
Many (if not most) users find low-contrast text difficult or impossible to read.
Failing Elements

Navigation

`[id]` attributes on active, focusable elements are not unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
Failing Elements
Heading elements are not in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
Failing Elements

Best practices

`[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.
Failing Elements

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
69

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that flutter.com should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Ensure CSP is effective against XSS attacks
Significantly reduce the risk of cross-site scripting attacks (XSS) by ensuring you have a strong Content Security Policy (CSP).
Description Directive Severity
No CSP found in enforcement mode
High

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
Fonts with `font-display: optional` are preloaded
It is recommended that optional fonts are preloaded.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids `unload` event listeners
The 'unload' event does not fire reliably, causing issues with browser optimizations such as the Back-Forward Cache. It is recommended that 'pagehide' or 'visibilitychange' events are used instead.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
jQuery
3.2.1
jQuery UI
1.12.1
Underscore
1.8.3
Handlebars
1.0.0
Drupal
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.
No issues in the `Issues` panel in Chrome Devtools
There may be unresolved issues logged to Chrome Devtools.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL Request Resolution
http://flutter.com/
Allowed
Includes front-end JavaScript libraries with known security vulnerabilities — 12 vulnerabilities detected
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.
Library Version Vulnerability Count Highest Severity
3
Medium
1
Medium
8
High

Audits

Displays images with incorrect aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
URL Aspect Ratio (Displayed) Aspect Ratio (Actual)
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
290 x 157 (1.85)
360 x 227 (1.59)
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
290 x 157 (1.85)
360 x 227 (1.59)
https://www.flutter.com/sites/paddy-power-betfair/files/styles/small_news/public/styles/small_news/public/styles/small_news/public/flutter-logo.png?itok=73FatUf2
290 x 157 (1.85)
360 x 227 (1.59)

Audits

Browser errors were logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
Source Description
Failed to load resource: the server responded with a status of 404 (Not Found)
Missing source maps for large first-party JavaScript
Consider deploying source maps for added benefits such as the ability to debug while in production.
URL Map URL
https://www.flutter.com/sites/paddy-power-betfair/files/js/js_6HfUi4GwIIk_CNvqMS-1vWfrcpyqM5nFob0M71Yj-dA.js
82

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for flutter.com. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of flutter.com on mobile screens.
Document uses legible font sizes — 100% legible text
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Source Selector % of Page Text Font Size
100.00%
≥ 12px

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Mobile Friendly

Tap targets are not sized appropriately — 56% appropriately sized tap targets
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.
Tap Target Size Overlapping Target
93x28
99x14
109x14
45x14
150x30
160x30

Content Best Practices

Links do not have descriptive text — 9 links found
Make use of descriptive link text to assist search engines in understanding the content.

Crawling and Indexing

Links are not crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
30

PWA

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of flutter.com. This includes details about web app manifests.

PWA Optimized

Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of flutter.com on mobile screens.

Installable

Web app manifest or service worker do not meet the installability requirements — 1 reason
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
Failure reason
No manifest was fetched

PWA Optimized

Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.
Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Hosting

Server Location

Server IP Address: 52.17.142.199
Continent: Europe
Country: Ireland
Ireland Flag
Region: Leinster
City: Dublin
Longitude: -6.2489
Latitude: 53.3331
Currencies: EUR
Languages: English
Irish

Web Hosting Provider

Name IP Address
Amazon Data Services Ireland Limited
Registration

Domain Registrant

Private Registration: No
Name:
Organization:
Country:
City:
State:
Post Code:
Email:
Phone:
Note: Registration information is derived from various sources and may be inaccurate.

Domain Registrar

Name IP Address
Safenames Ltd 45.223.58.112
Security

Visitor Safety

Mature Content: Not Likely
McAfee WebAdvisor Rating: Safe
WOT Rating:
WOT Trustworthiness: 42/100
WOT Child Safety: 10/100
Note: Safety information is not guaranteed.

SSL/TLS Certificate

Issued To: www.flutter.com
Issued By: HydrantID SSL CA G3
Valid From: 28th April, 2021
Valid To: 28th April, 2022
Subject: CN = www.flutter.com
O = Paddy Power Betfair Limited
L = Dublin
S = IE
Hash: b7025ae8
Issuer: CN = HydrantID SSL CA G3
O = HydrantID (Avalanche Cloud Corporation)
S = US
Version: 2
Serial Number: 0x2F3F04B69476596A301071B0CDF5B39C2972FEDE
Serial Number (Hex): 2F3F04B69476596A301071B0CDF5B39C2972FEDE
Valid From: 28th April, 2024
Valid To: 28th April, 2024
Signature Algorithm (Short Name): RSA-SHA256
Signature Algorithm (Long Name): sha256WithRSAEncryption
Authority Key Identifier: keyid:CC:A2:F3:38:AD:F6:C5:54:27:32:46:C5:39:5F:49:72:13:13:80:79
Extended Key Usage: TLS Web Client Authentication, TLS Web Server Authentication
CRL Distribution Points:
Full Name:
URI:http://crl.quovadisglobal.com/hydrantidsslcag3.crl

Certificate Policies: Policy: 2.23.140.1.2.2
Policy: 1.3.6.1.4.1.8024.0.3.900.0
CPS: http://www.hydrantid.com/support/repository

Authority Information Access: CA Issuers - URI:http://trust.quovadisglobal.com/hydrantidsslcag3.crt
OCSP - URI:http://ocsp.quovadisglobal.com

SCT List: Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 29:79:BE:F0:9E:39:39:21:F0:56:73:9F:63:A5:77:E5:
BE:57:7D:9C:60:0A:F8:F9:4D:5D:26:5C:25:5D:C7:84
Timestamp : Apr 28 14:52:55.590 2021 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:46:02:21:00:FB:C3:84:D9:E3:63:E4:69:E2:4C:CF:
1F:AC:CF:E2:AC:FC:36:28:87:B0:5F:1B:42:7F:EA:2B:
3A:C8:BB:29:7D:02:21:00:AB:A1:01:80:16:E8:E6:9C:
48:54:80:43:70:4D:B3:89:F0:1B:AB:C4:43:21:8E:92:
AA:70:D3:60:50:BE:69:05
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 46:A5:55:EB:75:FA:91:20:30:B5:A2:89:69:F4:F3:7D:
11:2C:41:74:BE:FD:49:B8:85:AB:F2:FC:70:FE:6D:47
Timestamp : Apr 28 14:52:55.538 2021 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:20:34:21:E8:53:FF:F8:B0:5C:88:0B:4E:76:
EF:0F:60:E4:09:1D:F5:6E:0B:FD:0B:7D:02:2D:32:5F:
F9:76:40:12:02:21:00:E8:54:0B:C4:BF:65:4C:F4:5A:
C8:00:4F:37:33:28:55:DF:F1:FD:E9:70:F1:21:BA:50:
28:5D:03:A7:E5:25:6D
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 51:A3:B0:F5:FD:01:79:9C:56:6D:B8:37:78:8F:0C:A4:
7A:CC:1B:27:CB:F7:9E:88:42:9A:0D:FE:D4:8B:05:E5
Timestamp : Apr 28 14:52:56.220 2021 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:20:03:73:AA:D5:D7:98:83:9F:C4:EB:41:F5:
3E:CF:FA:52:4B:2D:74:E7:4B:1C:F1:2D:C5:0E:FC:B9:
21:B2:A5:30:02:21:00:85:7E:37:73:D4:46:1E:9E:D6:
F1:3A:36:D3:C7:46:88:3E:F5:B0:AD:C0:F0:36:FF:E0:
AA:9D:49:3E:2C:2E:8F
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : DF:A5:5E:AB:68:82:4F:1F:6C:AD:EE:B8:5F:4E:3E:5A:
EA:CD:A2:12:A4:6A:5E:8E:3B:12:C0:20:44:5C:2A:73
Timestamp : Apr 28 14:52:55.880 2021 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:44:02:20:5B:40:69:18:2B:47:70:62:44:70:CA:81:
7F:A2:A3:27:23:DD:66:14:00:A8:56:32:8E:87:7E:88:
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DE:A4:77:4E:29:42:C6:C2:28:8F:44:38:50:B3:BF:E1:
95:B7:61:5D:87:AD
Key Usage: Digital Signature, Key Encipherment
Basic Constraints: CA:FALSE
Subject Alternative Name: DNS:flutter.com
DNS:www.flutter.com
Technical

DNS Lookup

HTTP Response Headers

HTTP-Code: HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Cache-Control: public, max-age=846
Expires: 23rd November, 2021
Date: 23rd November, 2021
Link: <https://www.flutter.com/home-page>; rel="alternate"; hreflang="en"
X-UA-Compatible: IE=edge
Content-Language: en
X-Content-Type-Options: nosniff
Last-Modified: 22nd November, 2021
ETag: "1637599611"
Vary: Cookie
X-Drupal-Cache: HIT
X-MID-Host: IRE-Q-11
X-XSS-Protection: 1; mode=block
Content-Length: 0
Connection: keep-alive
Set-Cookie: *

Whois Lookup

Created: 26th March, 2002
Changed: 30th March, 2020
Expires: 26th March, 2022
Registrar: Safenames Ltd
Status: ok
Nameservers: edns81.ultradns.biz
edns81.ultradns.com
edns81.ultradns.net
edns81.ultradns.org
Owner Name: Data protected, not disclosed
Owner Street: Belfield Office Park
Beechill Road
Owner Post Code: 00000
Owner City: Dublin 4
Owner Country: IE
Owner Phone: Data protected, not disclosed
Owner Email: 0r0cg4vs6p31@idp.email
Admin Name: International Domain Administrator
Admin Street: Safenames House, Sunrise Parkway
Linford Wood
Admin Post Code: MK14 6LS
Admin City: Milton Keynes
Admin State: Bucks
Admin Country: UK
Admin Phone: +44.1908200022
Admin Email: hostmaster@safenames.net
Tech Name: International Domain Tech
Tech Street: Safenames House, Sunrise Parkway
Linford Wood
Tech Post Code: MK14 6LS
Tech City: Milton Keynes
Tech State: Bucks
Tech Country: UK
Tech Phone: +44.1908200022
Tech Email: hostmaster@safenames.net
Full Whois: Domain Name: FLUTTER.COM
Registry Domain ID: 84898873_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.safenames.net
Registrar URL: http://www.safenames.net
Updated Date: 2020-03-30T06:07:10Z
Creation Date: 2002-03-26T22:08:41Z
Registrar Registration Expiration Date: 2022-03-26T21:08:41Z
Registrar: Safenames Ltd
Registrar IANA ID: 447
Registrar Abuse Contact Email: abuse@safenames.net
Registrar Abuse Contact Phone: +44.1908200022
Domain Status: ok https://icann.org/epp#ok
Registry Registrant ID: Not Available From Registry
Registrant Name: Data protected, not disclosed
Registrant Organisation: Power Leisure Bookmakers Limited
Registrant Street: Belfield Office Park
Registrant Street: Beechill Road
Registrant City: Dublin 4
Registrant State/Province:
Registrant Postal Code: 00000
Registrant Country: IE
Registrant Phone: Data protected, not disclosed
Registrant Fax: Data protected, not disclosed
Registrant Email: 0r0cg4vs6p31@idp.email
Registry Admin ID: Not Available From Registry
Admin Name: International Domain Administrator
Admin Organisation: Safenames Ltd
Admin Street: Safenames House, Sunrise Parkway
Admin Street: Linford Wood
Admin City: Milton Keynes
Admin State/Province: Bucks
Admin Postal Code: MK14 6LS
Admin Country: UK
Admin Phone: +44.1908200022
Admin Fax: +44.1908325192
Admin Email: hostmaster@safenames.net
Registry Tech ID: Not Available From Registry
Tech Name: International Domain Tech
Tech Organisation: Safenames Ltd
Tech Street: Safenames House, Sunrise Parkway
Tech Street: Linford Wood
Tech City: Milton Keynes
Tech State/Province: Bucks
Tech Postal Code: MK14 6LS
Tech Country: UK
Tech Phone: +44.1908200022
Tech Fax: +44.1908325192
Tech Email: hostmaster@safenames.net
Name Server: edns81.ultradns.biz
Name Server: edns81.ultradns.com
Name Server: edns81.ultradns.net
Name Server: edns81.ultradns.org
DNSSEC: unsigned
URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/
>>> Last update of WHOIS database: 2020-03-30T06:07:10Z <<<

"For more information on Whois status codes, please visit https://icann.org/epp"

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Nameservers

Name IP Address
edns81.ultradns.biz 204.74.67.81
edns81.ultradns.com 204.74.66.81
edns81.ultradns.net 204.74.110.81
edns81.ultradns.org 204.74.111.81
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