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officiallondontheatre.com

officiallondontheatre.com is SSL secured

Free website and domain report on officiallondontheatre.com

Last Updated: 5th October, 2020 Update Now
Overview

Snoop Summary for officiallondontheatre.com

This is a free and comprehensive report about officiallondontheatre.com. The domain officiallondontheatre.com is currently hosted on a server located in United States with the IP address 99.84.47.28, where USD is the local currency and the local language is English. Officiallondontheatre.com has the potential to be earning an estimated $3 USD per day from advertising revenue. If officiallondontheatre.com was to be sold it would possibly be worth $2,115 USD (based on the daily revenue potential of the website over a 24 month period). Officiallondontheatre.com is quite popular with an estimated 1,012 daily unique visitors. This report was last updated 5th October, 2020.

About officiallondontheatre.com

Site Preview: officiallondontheatre.com officiallondontheatre.com
Title: spinner11
Description: Visit the number one site for tickets to top London shows. Keep up-to-date with theatre news and plan your visit with exclusive guides to Theatreland.
Keywords and Tags: advocacy, entertainment, ngo, non-profit
Related Terms:
Fav Icon:
Age: Over 24 years old
Domain Created: 25th October, 1999
Domain Updated: 20th October, 2019
Domain Expires: 25th October, 2021
Review

Snoop Score

2/5

Valuation

$2,115 USD
Note: All valuation figures are estimates.

Popularity

Modest
Note: Popularity is estimated.

Rank, Reach and Authority

Alexa Rank: 802,655
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: 1,012
Monthly Visitors: 30,802
Yearly Visitors: 369,380
Note: All visitors figures are estimates.

Visitors By Country

Revenue

Revenue

Daily Revenue: $3 USD
Monthly Revenue: $88 USD
Yearly Revenue: $1,053 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: officiallondontheatre.com 25
Domain Name: officiallondontheatre 21
Extension (TLD): com 3
Expiry Check:

Page Speed Analysis

Average Load Time:
Load Time Comparison:

PageSpeed Insights

Avg. (All Categories) 72
Performance 81
Accessibility 76
Best Practices 64
SEO 92
Progressive Web App 48
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://officiallondontheatre.com/
Updated: 5th October, 2020

0.97 seconds
First Contentful Paint (FCP)
77%
21%
2%

0.00 seconds
First Input Delay (FID)
98%
1%
1%

Simulate loading on desktop
81

Performance

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

Metrics

First Contentful Paint — 0.7 s
The time taken for the first image or text on the page to be rendered.
Time to Interactive — 1.7 s
The time taken for the page to become fully interactive.
Total Blocking Time — 100 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).

Other

First CPU Idle — 1.5 s
The time taken for the page's main thread to be quiet enough to handle input.
First Meaningful Paint — 0.7 s
The time taken for the primary content of the page to be rendered.
Estimated Input Latency — 10 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive officiallondontheatre.com as laggy when the latency is higher than 0.05 seconds.
Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://officiallondontheatre.com/
0
275.32499999506
478
0
301
text/html
https://officiallondontheatre.com/
275.85199999157
353.70300000068
24765
107841
200
text/html
Document
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/css/main.bundle.401fff3ee0efedc91168.css
374.32299999637
511.79999997839
40185
219436
200
text/css
Stylesheet
https://cdn.jsdelivr.net/npm/lightgallery.js@1.1.3/dist/css/lightgallery.min.css
375.22299998091
401.70899999794
4413
20370
200
text/css
Stylesheet
https://cdnjs.cloudflare.com/ajax/libs/autotrack/2.4.1/autotrack.js
403.66799998446
426.41699998057
8189
24792
200
application/javascript
Script
https://res.cloudinary.com/solt/image/upload/v1598954164/see-it-safely_bbz4az.svg
428.62399999285
448.40599998133
9097
33374
200
image/svg+xml
Image
https://cdn.jsdelivr.net/npm/lightgallery.js@1.1.3/dist/js/lightgallery.min.js
453.81599999382
475.75199999847
7516
24552
200
application/javascript
Script
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
478.85399998631
661.17599999416
431798
1600486
200
application/javascript
Script
https://www.google-analytics.com/analytics.js
528.46599998884
532.81799997785
19293
46489
200
text/javascript
Script
537.05899999477
537.10299998056
0
42
200
image/gif
Image
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1559298964/Shaftsbury-Avenue_r2emiw.jpg
564.53899998451
595.4769999953
202464
201710
200
image/webp
Image
https://use.typekit.net/cmc5yqi.js
621.80100000114
690.90199997299
7271
17546
200
text/javascript
Script
https://www.google-analytics.com/plugins/ua/ecommerce.js
635.29299999936
642.08399999188
1347
1403
200
text/javascript
Script
https://www.google-analytics.com/plugins/ua/linkid.js
639.46799997939
643.12199997948
1468
1569
200
text/javascript
Script
https://www.google-analytics.com/gtm/js?id=GTM-NR7MRMT&cid=1980643856.1601912086
653.4479999973
721.75899997819
33032
81830
200
application/javascript
Script
https://use.typekit.net/af/2553b3/000000000000000000011c34/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3
700.96899999771
722.74800000014
19575
19272
200
application/font-woff2
Font
https://use.typekit.net/af/827015/000000000000000000011c3b/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3
701.81999998749
725.64499999862
18771
18468
200
application/font-woff2
Font
https://use.typekit.net/af/053fc9/00000000000000003b9af1e4/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3
702.31100000092
726.65499997674
40763
40460
200
application/font-woff2
Font
https://p.typekit.net/p.gif?s=1&k=cmc5yqi&ht=tk&h=officiallondontheatre.com&f=14541.14548.32874&a=8811661&js=1.20.0&app=typekit&e=js&_=1601912085763
770.58299997589
843.03699998418
335
35
200
image/gif
Image
https://api.officiallondontheatre.com/shows?timeSlot=all&from=2020-10-05&source=olt
1090.7219999935
1540.4279999784
26758
163572
200
application/json
Fetch
https://res.cloudinary.com/solt/image/upload/c_crop,f_auto,q_auto,fl_progressive:semi,w_1700,g_west/v1579174896/Shaftsbury-Avenue-EXTEND_REBUILD-DS_onp8si.jpg
1156.5389999887
1184.4059999858
271494
270839
200
image/jpeg
Image
https://officiallondontheatre.com/wp-content/themes/solt-wp/dist/images/checkbox.svg
1157.1239999903
1657.1999999869
975
443
200
image/svg+xml
Image
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601636916/OFAH_1200X600_a6z8fi.jpg
1171.9509999966
1191.759999987
97337
96588
200
image/webp
Image
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601636503/OA_800x800_fte3w3.jpg
1173.5159999807
1192.8559999797
44216
43470
200
image/webp
Image
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601052236/1200x600_TLK_Sky_VIP_jdsluq.jpg
1175.1589999767
1194.5219999761
95818
95062
200
image/webp
Image
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1600420002/See_It_Safely_800x800_b6qwz7.jpg
1175.9159999783
1230.3979999851
119584
118826
200
image/webp
Image
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1600420025/See_It_Safely_1200x600_inidpz.jpg
1246.1780000012
1277.5099999853
118795
118036
200
image/webp
Image
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601281783/1200x600_JPG_3_jblrgi.jpg
1246.8430000008
1266.249999986
69760
69010
200
image/webp
Image
https://www.instagram.com/londontheatre/?__a=1
1261.7829999945
1349.7050000005
3086
0
302
text/html
https://www.google-analytics.com/collect?v=1&_v=j86&aip=1&a=1580077180&t=pageview&_s=1&dl=https%3A%2F%2Fofficiallondontheatre.com%2F&dp=%2F&ul=en-us&de=UTF-8&dt=Official%20London%20Theatre%20-%20Theatre%20Tickets%2C%20News%20%26%20Guides&sd=24-bit&sr=800x600&vp=1350x940&je=0&_u=aGBACEIzR~&cid=1980643856.1601912086&tid=UA-1059329-6&_gid=375123067.1601912086&_av=2.4.1&_au=3ff&did=i5iSjo&z=696879984
1339.7639999748
1342.6239999826
615
35
200
image/gif
Image
https://www.instagram.com/accounts/login/?next=/londontheatre/%3F__a%3D1
1350.1019999967
1474.5939999993
23097
20610
429
text/html
XHR
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)
395.607
10.792
488.316
8.484
551.85
12.566
564.459
36.463
600.938
49.682
656.633
7.224
666.38
25.791
730.603
10.369
741.051
27.971
779.049
27.345
809.063
492.239
1301.358
16.179
1317.654
7.706
1329.903
12.709
1352.124
25.731
1388.598
9.741
1401.971
36.469
1584.589
13.97
1696.07
6.416
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Opportunities

Properly size images
Images can slow down the page's load time. Officiallondontheatre.com should consider serving more appropriate-sized images.
Defer offscreen images — Potential savings of 9 KiB
Time to Interactive can be slowed down by resources on the page. Officiallondontheatre.com should consider lazy-loading offscreen and hidden images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://res.cloudinary.com/solt/image/upload/v1598954164/see-it-safely_bbz4az.svg
9097
9097
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Officiallondontheatre.com should consider minifying CSS files.
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Officiallondontheatre.com should consider minifying JS files.
Remove unused CSS — Potential savings of 36 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Officiallondontheatre.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://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/css/main.bundle.401fff3ee0efedc91168.css
40185
36828
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Serve images in next-gen formats — Potential savings of 34 KiB
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://res.cloudinary.com/solt/image/upload/c_crop,f_auto,q_auto,fl_progressive:semi,w_1700,g_west/v1579174896/Shaftsbury-Avenue-EXTEND_REBUILD-DS_onp8si.jpg
270839
34621
Enable text compression — Potential savings of 15 KiB
Text-based resources should be served with compression, such as gzip, deflate or brotli.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://www.instagram.com/accounts/login/?next=/londontheatre/%3F__a%3D1
20610
14947
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 80 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://officiallondontheatre.com/
78.848
Avoid multiple page redirects — Potential savings of 190 ms
Redirects can cause additional delays before the page can begin loading. Officiallondontheatre.com should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
http://officiallondontheatre.com/
190
https://officiallondontheatre.com/
0
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Officiallondontheatre.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 — Potential savings of 11 KiB
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.
URL Potential Savings (Bytes)
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
11308

Diagnostics

Avoids enormous network payloads — Total size was 1,701 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
431798
https://res.cloudinary.com/solt/image/upload/c_crop,f_auto,q_auto,fl_progressive:semi,w_1700,g_west/v1579174896/Shaftsbury-Avenue-EXTEND_REBUILD-DS_onp8si.jpg
271494
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1559298964/Shaftsbury-Avenue_r2emiw.jpg
202464
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1600420002/See_It_Safely_800x800_b6qwz7.jpg
119584
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1600420025/See_It_Safely_1200x600_inidpz.jpg
118795
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601636916/OFAH_1200X600_a6z8fi.jpg
97337
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601052236/1200x600_TLK_Sky_VIP_jdsluq.jpg
95818
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601281783/1200x600_JPG_3_jblrgi.jpg
69760
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601636503/OA_800x800_fte3w3.jpg
44216
https://use.typekit.net/af/053fc9/00000000000000003b9af1e4/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3
40763
Avoid chaining critical requests — 5 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Officiallondontheatre.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 — 0.4 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://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
585.174
397.883
25.739
https://officiallondontheatre.com/
314.592
15.502
3.586
Unattributable
82.962
4.244
0.172
Minimizes main-thread work — 1.1 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)
Script Evaluation
475.7
Style & Layout
187.235
Rendering
164.52000000001
Other
157.56
Script Parsing & Compilation
40.857
Parse HTML & CSS
31.946
Garbage Collection
12.684
Keep request counts low and transfer sizes small — 30 requests • 1,701 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
30
1742295
Image
12
1030490
Script
8
509914
Font
3
79109
Other
4
53419
Stylesheet
2
44598
Document
1
24765
Media
0
0
Third-party
24
1217336
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)
SHOW DETAILS
1028565
0
SHOW DETAILS
86715
0
SHOW DETAILS
55755
0
SHOW DETAILS
26183
0
SHOW DETAILS
11929
0
SHOW DETAILS
8189
0
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
div
Avoid large layout shifts — 5 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element CLS Contribution
Editor's Picks Editor's Pick Olivier Awards 2020 with Mastercard to announce wi…
0.25957705720836
Book tickets to see... Search for a show
0.062789598108747
# I MISS THEATRE Are you missing theatre as much as we are? Support us now by b…
0.04387706855792
::after
0.023640661938534
div
0.0084475965327029
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 — 1 long task 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://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
1650
246
Avoid non-composited animations
It is recommended to avoid non-composited animations which are often janky and increase CLS.

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

Speed Index — 1.4 s
The time taken for the page contents to be visibly populated.
Largest Contentful Paint — 2.3 s
The timing of the largest text or image that is painted.

Other

Max Potential First Input Delay — 250 ms
Users could experience a delay when interacting with the page.

Opportunities

Eliminate render-blocking resources — Potential savings of 280 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Officiallondontheatre.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://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/css/main.bundle.401fff3ee0efedc91168.css
40185
310
https://cdn.jsdelivr.net/npm/lightgallery.js@1.1.3/dist/css/lightgallery.min.css
4413
230
Remove unused JavaScript — Potential savings of 268 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://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
431798
251746
https://www.google-analytics.com/gtm/js?id=GTM-NR7MRMT&cid=1980643856.1601912086
33032
22991

Diagnostics

Serve static assets with an efficient cache policy — 9 resources found
Officiallondontheatre.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://use.typekit.net/cmc5yqi.js
600000
7271
https://officiallondontheatre.com/wp-content/themes/solt-wp/dist/images/checkbox.svg
1200000
975
https://www.google-analytics.com/plugins/ua/linkid.js
3600000
1468
https://www.google-analytics.com/plugins/ua/ecommerce.js
3600000
1347
https://www.google-analytics.com/analytics.js
7200000
19293
https://p.typekit.net/p.gif?s=1&k=cmc5yqi&ht=tk&h=officiallondontheatre.com&f=14541.14548.32874&a=8811661&js=1.20.0&app=typekit&e=js&_=1601912085763
604800000
335
https://res.cloudinary.com/solt/image/upload/v1598954164/see-it-safely_bbz4az.svg
2592000000
9097
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
5184000000
431798
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/css/main.bundle.401fff3ee0efedc91168.css
5184000000
40185
Avoid an excessive DOM size — 1,031 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
1,031
Maximum DOM Depth
SHOW DETAILS
18
Maximum Child Elements
SHOW DETAILS
32

Metrics

Cumulative Layout Shift — 0.399
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Diagnostics

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/2553b3/000000000000000000011c34/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3
21.779000002425
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24.343999975827
Does not use passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
URL Location
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
line: 28
Replace unnecessarily large JavaScript libraries — 1 large library found
It is recommended to work with smaller JavaScript libraries to reduce your bundle size and avoid poor performance.
Library Transfer Size (Bytes) Potential Savings (Bytes)
SHOW DETAILS
67489
76

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of officiallondontheatre.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.
`[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.
`[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-*]` 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.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
`<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.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
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.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Officiallondontheatre.com may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Officiallondontheatre.com may provide relevant information that dialogue cannot, by using audio descriptions.

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
Are you missing theatre as much as we are? Support us now by buying Theatre Tok…
Theatre Tokens
Search for a show
Editor's Pick
Editor's Pick
Editor's Pick
Go

Names and labels

`<frame>` or `<iframe>` elements do not have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Failing Elements
iframe
Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img
Form elements do not have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Failing Elements
input
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.

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
Editor's Pick Olivier Awards 2020 with Mastercard to announce winners on Sunday…

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.
64

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that officiallondontheatre.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.

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.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
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 Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
React
Lo-Dash
4.17.15
Moment.js
2.24.0
core-js
2.6.9: pure, 2.6.9: global, 3.1.3: pure, 2.6.9: pure
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.

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
http://officiallondontheatre.com/
Links to cross-origin destinations are unsafe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Includes front-end JavaScript libraries with known security vulnerabilities — 1 vulnerability 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
SHOW DETAILS
1
Medium

Audits

Registers an `unload` listener
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.
URL
SHOW DETAILS
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.
URL Description
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
Error: Request failed with status code 429 at e.exports (https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js:82:53434) at e.exports (https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js:87:519293) at XMLHttpRequest.p.onreadystatechange (https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js:82:52284)
https://www.instagram.com/accounts/login/?next=/londontheatre/%3F__a%3D1
Failed to load resource: the server responded with a status of 429 (Too Many Requests)
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://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.map
https://cdnjs.cloudflare.com/ajax/libs/autotrack/2.4.1/autotrack.js
https://cdnjs.cloudflare.com/ajax/libs/autotrack/2.4.1/autotrack.js.map
92

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for officiallondontheatre.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 officiallondontheatre.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.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
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.
Links are 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.
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

Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img

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.
48

Progressive Web App

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

Fast and reliable

Page load is fast enough on mobile networks
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
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 officiallondontheatre.com on mobile screens.
Contains some content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.
Provides 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.

Fast and reliable

Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

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
http://officiallondontheatre.com/
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.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

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
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) 65
Performance 43
Accessibility 76
Best Practices 64
SEO 93
Progressive Web App 50
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://officiallondontheatre.com/
Updated: 5th October, 2020

1.00 seconds
First Contentful Paint (FCP)
74%
22%
4%

0.03 seconds
First Input Delay (FID)
95%
4%
1%

Simulate loading on mobile
43

Performance

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

Metrics

First Contentful Paint — 2.3 s
The time taken for the first image or text on the page to be rendered.

Other

First Meaningful Paint — 2.3 s
The time taken for the primary content of the page to be rendered.
Network Requests
Below is a list of network requests that were made during page load.
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Stylesheet
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XHR
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)
156.105
10.413
238.653
9.658
249.762
9.818
259.715
31.485
294.522
35.379
345.199
21.196
371.039
10.43
381.485
24.69
407.35
418.567
826.221
11.731
845.183
7.908
856.048
6.472
862.882
32.44
901.525
30.815
934.105
26.787
962.84
15.057
987.248
27.042
1014.322
18.582
1089.768
15.144
1436.938
6.561
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Opportunities

Properly size images
Images can slow down the page's load time. Officiallondontheatre.com should consider serving more appropriate-sized images.
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Officiallondontheatre.com should consider minifying CSS files.
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Officiallondontheatre.com should consider minifying JS files.
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Serve images in next-gen formats
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
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 70 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://officiallondontheatre.com/
65.895
Avoid multiple page redirects — Potential savings of 630 ms
Redirects can cause additional delays before the page can begin loading. Officiallondontheatre.com should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
http://officiallondontheatre.com/
630
https://officiallondontheatre.com/
0
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Officiallondontheatre.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.

Diagnostics

Avoids enormous network payloads — Total size was 1,373 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
431770
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1559298964/Shaftsbury-Avenue_r2emiw.jpg
202464
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1600420025/See_It_Safely_1200x600_inidpz.jpg
118795
https://officiallondontheatre.com/undefined
99070
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601636916/OFAH_1200X600_a6z8fi.jpg
97337
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601052236/1200x600_TLK_Sky_VIP_jdsluq.jpg
95818
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601281783/1200x600_JPG_3_jblrgi.jpg
69760
https://use.typekit.net/af/053fc9/00000000000000003b9af1e4/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3
40763
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/css/main.bundle.401fff3ee0efedc91168.css
40185
https://www.google-analytics.com/gtm/js?id=GTM-NR7MRMT&cid=976282193.1601912103
33032
Avoid chaining critical requests — 5 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Officiallondontheatre.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 — 28 requests • 1,373 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
28
1406063
Image
10
694266
Script
8
509886
Font
3
79109
Other
4
53439
Stylesheet
2
44598
Document
1
24765
Media
0
0
Third-party
21
782061
Minimize third-party usage — Third-party code blocked the main thread for 80 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)
SHOW DETAILS
55755
77.208
SHOW DETAILS
593271
0
SHOW DETAILS
86715
0
SHOW DETAILS
26202
0
SHOW DETAILS
11929
0
SHOW DETAILS
8189
0
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
div
Avoid large layout shifts — 5 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element CLS Contribution
Editor's Picks Editor's Pick Olivier Awards 2020 with Mastercard to announce wi…
0.24991477272727
Book tickets to see... Search for a show
0.17849815538194
# I MISS THEATRE Are you missing theatre as much as we are? Support us now by b…
0.072891808712121
div
0.0429541015625
div
0.028462515782828
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 — 10 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://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
8670
837
https://officiallondontheatre.com/
1310
126
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
9715
108
https://www.google-analytics.com/gtm/js?id=GTM-NR7MRMT&cid=976282193.1601912103
4106
107
https://www.google-analytics.com/analytics.js
2790
85
Unattributable
649
74
https://officiallondontheatre.com/
1436
71
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
9558
65
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
9623
62
https://officiallondontheatre.com/
1556
61
Avoid non-composited animations
It is recommended to avoid non-composited animations which are often janky and increase CLS.

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

Speed Index — 5.7 s
The time taken for the page contents to be visibly populated.
Total Blocking Time — 530 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).

Opportunities

Remove unused CSS — Potential savings of 36 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Officiallondontheatre.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://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/css/main.bundle.401fff3ee0efedc91168.css
40185
37361
Enable text compression — Potential savings of 15 KiB
Text-based resources should be served with compression, such as gzip, deflate or brotli.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://www.instagram.com/accounts/login/?next=/londontheatre/%3F__a%3D1
20610
14947
Avoid serving legacy JavaScript to modern browsers — Potential savings of 11 KiB
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.
URL Potential Savings (Bytes)
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
11307

Diagnostics

Serve static assets with an efficient cache policy — 9 resources found
Officiallondontheatre.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://use.typekit.net/cmc5yqi.js
600000
7271
https://officiallondontheatre.com/wp-content/themes/solt-wp/dist/images/checkbox.svg
1200000
975
https://www.google-analytics.com/plugins/ua/linkid.js
3600000
1468
https://www.google-analytics.com/plugins/ua/ecommerce.js
3600000
1347
https://www.google-analytics.com/analytics.js
7200000
19293
https://p.typekit.net/p.gif?s=1&k=cmc5yqi&ht=tk&h=officiallondontheatre.com&f=14541.14548.32874&a=8811661&js=1.20.0&app=typekit&e=js&_=1601912103366
604800000
335
https://res.cloudinary.com/solt/image/upload/v1598954164/see-it-safely_bbz4az.svg
2592000000
9097
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
5184000000
431770
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/css/main.bundle.401fff3ee0efedc91168.css
5184000000
40185
Avoid an excessive DOM size — 1,031 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
1,031
Maximum DOM Depth
SHOW DETAILS
18
Maximum Child Elements
SHOW DETAILS
32
Reduce JavaScript execution time — 1.9 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://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
2048.412
1377.98
92.984
https://officiallondontheatre.com/
1176.688
62.052
13.176
Unattributable
363.4
89.704
0.72
https://www.google-analytics.com/gtm/js?id=GTM-NR7MRMT&cid=976282193.1601912103
137.524
124.324
8.924
https://www.google-analytics.com/analytics.js
85.824
76.608
6.332
Minimize main-thread work — 3.9 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)
Script Evaluation
1743.048
Style & Layout
701.688
Rendering
614.86000000001
Other
556.088
Script Parsing & Compilation
145.12
Parse HTML & CSS
106.836
Garbage Collection
31.576

Other

First Contentful Paint (3G) — 4590 ms
The time taken for the first image or text on the page to be rendered while on a 3G network.

Metrics

Largest Contentful Paint — 9.4 s
The timing of the largest text or image that is painted.
Time to Interactive — 8.3 s
The time taken for the page to become fully interactive.
Cumulative Layout Shift — 0.573
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

First CPU Idle — 6.7 s
The time taken for the page's main thread to be quiet enough to handle input.
Max Potential First Input Delay — 840 ms
Users could experience a delay when interacting with the page.
Estimated Input Latency — 280 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive officiallondontheatre.com as laggy when the latency is higher than 0.05 seconds.

Opportunities

Eliminate render-blocking resources — Potential savings of 1,000 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Officiallondontheatre.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://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/css/main.bundle.401fff3ee0efedc91168.css
40185
1080
https://cdn.jsdelivr.net/npm/lightgallery.js@1.1.3/dist/css/lightgallery.min.css
4413
780
Defer offscreen images — Potential savings of 379 KiB
Time to Interactive can be slowed down by resources on the page. Officiallondontheatre.com should consider lazy-loading offscreen and hidden images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1600420025/See_It_Safely_1200x600_inidpz.jpg
118036
118036
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601636916/OFAH_1200X600_a6z8fi.jpg
96588
96588
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601052236/1200x600_TLK_Sky_VIP_jdsluq.jpg
95062
95062
https://res.cloudinary.com/solt/image/upload/q_90,fl_progressive,f_auto/v1601281783/1200x600_JPG_3_jblrgi.jpg
69010
69010
https://res.cloudinary.com/solt/image/upload/v1598954164/see-it-safely_bbz4az.svg
9097
9097
Remove unused JavaScript — Potential savings of 269 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://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
431770
252254
https://www.google-analytics.com/gtm/js?id=GTM-NR7MRMT&cid=976282193.1601912103
33032
22991

Diagnostics

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/2553b3/000000000000000000011c34/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3
77.15000002645
https://use.typekit.net/af/827015/000000000000000000011c3b/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3
78.604999987874
https://use.typekit.net/af/053fc9/00000000000000003b9af1e4/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3
84.230999986175
Does not use passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
URL Location
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
line: 28
Replace unnecessarily large JavaScript libraries — 1 large library found
It is recommended to work with smaller JavaScript libraries to reduce your bundle size and avoid poor performance.
Library Transfer Size (Bytes) Potential Savings (Bytes)
SHOW DETAILS
67489
76

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of officiallondontheatre.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.
`[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.
`[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-*]` 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.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
`<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.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
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.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Officiallondontheatre.com may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Officiallondontheatre.com may provide relevant information that dialogue cannot, by using audio descriptions.

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
Are you missing theatre as much as we are? Support us now by buying Theatre Tok…
Theatre Tokens
Search for a show
Editor's Pick
Editor's Pick
Editor's Pick
Go

Names and labels

`<frame>` or `<iframe>` elements do not have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Failing Elements
iframe
Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img
Form elements do not have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Failing Elements
input
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.

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
Editor's Pick Olivier Awards 2020 with Mastercard to announce winners on Sunday…

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.
64

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that officiallondontheatre.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.

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.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
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 Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
React
Lo-Dash
4.17.15
Moment.js
2.24.0
core-js
2.6.9: pure, 2.6.9: global, 3.1.3: pure, 2.6.9: pure
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.

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
http://officiallondontheatre.com/
Links to cross-origin destinations are unsafe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Includes front-end JavaScript libraries with known security vulnerabilities — 1 vulnerability 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
SHOW DETAILS
1
Medium

Audits

Registers an `unload` listener
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.
URL
SHOW DETAILS
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.
URL Description
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
Error: Request failed with status code 429 at e.exports (https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js:82:53434) at e.exports (https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js:87:519293) at XMLHttpRequest.p.onreadystatechange (https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js:82:52284)
https://officiallondontheatre.com/undefined
Failed to load resource: the server responded with a status of 404 (Not Found)
https://www.instagram.com/accounts/login/?next=/londontheatre/%3F__a%3D1
Failed to load resource: the server responded with a status of 429 (Too Many Requests)
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://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.bundle.401fff3ee0efedc91168.js
https://assets.officiallondontheatre.com/wp-content/themes/solt-wp/dist/js/main.map
https://cdnjs.cloudflare.com/ajax/libs/autotrack/2.4.1/autotrack.js
https://cdnjs.cloudflare.com/ajax/libs/autotrack/2.4.1/autotrack.js.map
93

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for officiallondontheatre.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 officiallondontheatre.com on mobile screens.
Document uses legible font sizes — 99.79% 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
SHOW DETAILS
small
0.21%
11.2px
SHOW DETAILS
99.79%
≥ 12px
Tap targets are sized appropriately — 100% 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.

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.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
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.
Links are 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.
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

Image elements do not have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Failing Elements
img

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.
50

Progressive Web App

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

Fast and reliable

Page load is fast enough on mobile networks
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
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 officiallondontheatre.com on mobile screens.
Contains some content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.
Provides 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.

Fast and reliable

Current page does not respond with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` does not respond with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

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
http://officiallondontheatre.com/
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.
Web app manifest does not meet the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

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
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: 99.84.47.28
Continent: North America
Country: United States
United States Flag
Region:
City:
Longitude: -97.822
Latitude: 37.751
Currencies: USD
USN
USS
Languages: English

Web Hosting Provider

Name IP Address
Amazon.com, Inc.
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
MESH DIGITAL LIMITED 109.68.33.21
Security

Visitor Safety

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

SSL/TLS Certificate

Issued To: officiallondontheatre.com
Issued By: Amazon
Valid From: 21st December, 2019
Valid To: 21st January, 2021
Subject: CN = officiallondontheatre.com
Hash: c5e4467f
Issuer: CN = Amazon
OU = Server CA 1B
O = Amazon
S = US
Version: 2
Serial Number: 19763662253369326476708309823378940857
Serial Number (Hex): 0EDE57C7EE4930D305E5EB82AC1BE3B9
Valid From: 21st December, 2024
Valid To: 21st January, 2024
Signature Algorithm (Short Name): RSA-SHA256
Signature Algorithm (Long Name): sha256WithRSAEncryption
Authority Key Identifier: keyid:59:A4:66:06:52:A0:7B:95:92:3C:A3:94:07:27:96:74:5B:F9:3D:D0
Extended Key Usage: TLS Web Server Authentication, TLS Web Client Authentication
CRL Distribution Points:
Full Name:
URI:http://crl.sca1b.amazontrust.com/sca1b.crl
Certificate Policies: Policy: 2.16.840.1.114412.1.2
Policy: 2.23.140.1.2.1
Authority Information Access: OCSP - URI:http://ocsp.sca1b.amazontrust.com
CA Issuers - URI:http://crt.sca1b.amazontrust.com/sca1b.crt
SCT List: Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : A4:B9:09:90:B4:18:58:14:87:BB:13:A2:CC:67:70:0A:
3C:35:98:04:F9:1B:DF:B8:E3:77:CD:0E:C8:0D:DC:10
Timestamp : Dec 21 01:27:13.385 2019 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:21:00:E4:5B:83:FC:BE:24:52:FE:6C:20:6F:
B1:81:A7:80:4E:40:C4:F2:87:E9:34:45:06:69:D7:52:
77:3E:FD:28:AD:02:20:12:FF:F2:B8:D2:48:95:47:D4:
D7:13:BF:8D:8F:60:BA:5A:0E:27:FC:43:2C:16:19:23:
C6:FA:BD:C8:66:E3:2E
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 87:75:BF:E7:59:7C:F8:8C:43:99:5F:BD:F3:6E:FF:56:
8D:47:56:36:FF:4A:B5:60:C1:B4:EA:FF:5E:A0:83:0F
Timestamp : Dec 21 01:27:13.542 2019 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:21:00:B2:91:F5:AA:B7:13:99:5C:F8:40:A8:
F9:46:67:C0:01:50:AD:D2:F7:76:26:F3:42:6C:A3:21:
BF:EE:19:27:8F:02:20:01:87:44:D3:8B:15:98:A1:FA:
37:4C:B2:E4:95:52:39:69:4C:FF:42:8E:BA:DD:40:0E:
93:8C:60:72:F3:DF:93
Key Usage: Digital Signature, Key Encipherment
Basic Constraints: CA:FALSE
Subject Alternative Name: DNS:*.getintolondontheatre.co.uk
DNS:*.kidsweek.co.uk
DNS:*.officiallondontheatre.co.uk
DNS:*.officiallondontheatre.com
DNS:*.olivierawards.com
DNS:*.tkts.co.uk
DNS:getintolondontheatre.co.uk
DNS:kidsweek.co.uk
DNS:officiallondontheatre.co.uk
DNS:olivierawards.com
DNS:tkts.co.uk
DNS:officiallondontheatre.com
Technical

DNS Lookup

HTTP Response Headers

HTTP-Code: HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Date: 5th October, 2020
Server: Apache/2.4.29 (Ubuntu)
Cache-Control: public, max-age=0, s-maxage=3600
Content-Length: 0
Connection: keep-alive
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
X-SOLT-LoggedIn: false
X-Pingback: https://officiallondontheatre.com/xmlrpc.php
Link: <https://officiallondontheatre.com/>; rel=shortlink
X-Cache: Hit from cloudfront
Via: 1.1 fba70d1e4c74a3621a7d03b3d021b4dc.cloudfront.net (CloudFront)
X-Amz-Cf-Pop: EWR52-C4
X-Amz-Cf-Id: M0XGRBIbjDUOJKauN1N7Y_0M2UQtmOSZHodkx3c9M5qSr4KqoCiLag==

Whois Lookup

Created: 25th October, 1999
Changed: 20th October, 2019
Expires: 25th October, 2021
Registrar: MESH DIGITAL LIMITED
Status: clientUpdateProhibited
clientTransferProhibited
clientDeleteProhibited
Nameservers: dale.ns.cloudflare.com
roxy.ns.cloudflare.com
Owner Name: REDACTED FOR PRIVACY
Owner Organization: West End Theatre Managers Limited
Owner Street: REDACTED FOR PRIVACY
Owner Post Code: REDACTED FOR PRIVACY
Owner City: REDACTED FOR PRIVACY
Owner Country: GB
Owner Phone: REDACTED FOR PRIVACY
Owner Email: https://webform.meshdigital.com
Admin Email: https://webform.meshdigital.com
Tech Email: https://webform.meshdigital.com
Full Whois: Domain Name: OFFICIALLONDONTHEATRE.COM
Registry Domain ID: 11661130_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.meshdigital.com
Registrar URL: http://www.domainbox.com
Updated Date: 2019-10-20T03:34:59Z
Creation Date: 1999-10-25T09:58:34Z
Registrar Registration Expiration Date: 2021-10-25T09:58:34Z
Registrar: MESH DIGITAL LIMITED
Registrar IANA ID: 1390
Registrar Abuse Contact Email: support@domainbox.com
Registrar Abuse Contact Phone: +1.8779770099
Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: West End Theatre Managers Limited
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province:
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: GB
Registrant Phone: REDACTED FOR PRIVACY
Registrant Phone Ext: REDACTED FOR PRIVACY
Registrant Fax: REDACTED FOR PRIVACY
Registrant Fax Ext: REDACTED FOR PRIVACY
Registrant Email: https://webform.meshdigital.com
Admin Email: https://webform.meshdigital.com
Tech Email: https://webform.meshdigital.com
Name Server: dale.ns.cloudflare.com
Name Server: roxy.ns.cloudflare.com
DNSSEC: unsigned
URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/
>>> Last update of WHOIS database: 2020-10-05T16:34:42Z <<<
For more information on Whois status codes, please visit https://icann.org/epp

The Data in this WHOIS database is provided
for information purposes only, and is designed to assist persons in
obtaining information related to domain name registration records.
It's accuracy is not guaranteed. By submitting a
WHOIS query, you agree that you will use this Data only for lawful
purposes and that, under no circumstances will you use this Data to:
(1) allow, enable, or otherwise support the transmission of mass
unsolicited, commercial advertising or solicitations via e-mail(spam);
or (2) enable high volume, automated, electronic processes that
apply to this WHOIS or any of its related systems. The provider of
this WHOIS reserves the right to modify these terms at any time.
By submitting this query, you agree to abide by this policy.
LACK OF A DOMAIN RECORD IN THE WHOIS DATABASE DOES
NOT INDICATE DOMAIN AVAILABILITY.
View Raw Whois

Nameservers

Name IP Address
dale.ns.cloudflare.com 108.162.193.95
roxy.ns.cloudflare.com 172.64.32.142
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