Added 19 days ago, Updated 11 hours ago


Aggregated ChecksScore
App can load on offline/flaky connections0
Page load performance is fast71
Site is progressively enhanced100
Network connection is secure100
User can be prompted to Add to Homescreen0
Installed web app will launch with custom splash screen0
Address bar matches brand colors0
Design is mobile-friendly100
Uses HTTPStrue
Redirects HTTP traffic to HTTPStrue
Registers a Service Workerfalse
Responds with a 200 when offlinefalse
Has a `<meta name="viewport">` tag with `width` or `initial-scale`true
Manifest's `display` property is setfalse
Contains some content when JavaScript is not availabletrue
First meaningful paint55
Perceptual Speed Index80
Estimated Input Latency100
Time To Interactive (alpha)48
User Timing marks and measurestrue
Critical Request Chainsfalse
Manifest existsfalse
Manifest contains `background_color`false
Manifest contains `theme_color`false
Manifest contains icons at least 192pxfalse
Manifest contains icons at least 144pxfalse
Manifest contains `name`false
Manifest contains `short_name`false
Manifest's `short_name` won't be truncated when displayed on homescreenfalse
Manifest contains `start_url`false
Has a `<meta name="theme-color">` tagfalse
Content is sized correctly for the viewporttrue
Avoids deprecated APIstrue
Element aria-* attributes are allowed for this roletrue
Elements with ARIA roles have the required aria-* attributestrue
Element aria-* attributes have valid valuestrue
Element aria-* attributes are valid and not misspelled or non-existent.true
Background and foreground colors have a sufficient contrast ratiofalse
Every image element has an alt attributefalse
Every form element has a labeltrue
No element has a `tabindex` attribute greater than 0true
Avoids enormous network payloads100
Unoptimized imagestrue
Oversized Imagestrue
Avoids Application Cachetrue
Avoids an excessive DOM size100
Opens external anchors using rel="noopener"true
Avoids requesting the geolocation permission on page loadtrue
Render-blocking Stylesheetsfalse
Avoids `console.time()` in its own scriptstrue
Avoids `Date.now()` in its own scriptsfalse
Avoids `document.write()`true
Avoids Mutation Events in its own scriptstrue
Avoids old CSS flexboxfalse
Avoids WebSQL DBtrue
Avoids requesting the notification permission on page loadtrue
Render-blocking scriptstrue
Uses HTTP/2 for its own resourcestrue
Uses passive listeners to improve scrolling performancetrue


PageSpeed Insights


  "gcm_sender_id": "402845223712",
  "name": "YouTube",
  "start_url": "/",
  "gcm_user_visible_only": true,
  "display": "standalone"