René's URL Explorer Experiment


Title: Don't fight the browser preload scanner  |  Articles  |  web.dev

Open Graph Title: Don't fight the browser preload scanner  |  Articles  |  web.dev

Description: Find out what the browser preload scanner is, how it helps performance, and how you can stay out of its way.

Open Graph Description: Find out what the browser preload scanner is, how it helps performance, and how you can stay out of its way.

Opengraph URL: https://web.dev/articles/preload-scanner

direct link

Domain: web.dev


Hey, it has json ld scripts:
  {
    "@context": "https://schema.org",
    "@type": "Article",
    "dateModified": "2022-05-13",
    "headline": "Don't fight the browser preload scanner"
  }
  {
    "@context": "https://schema.org",
    "@type": "BreadcrumbList",
    "itemListElement": [{
      "@type": "ListItem",
      "position": 1,
      "name": "Articles",
      "item": "https://web.dev/articles"
    },{
      "@type": "ListItem",
      "position": 2,
      "name": "Don't fight the browser preload scanner",
      "item": "https://web.dev/articles/preload-scanner"
    }]
  }
  

google-signin-client-id157101835696-ooapojlodmuabs2do2vuhhnf90bccmoi.apps.googleusercontent.com
google-signin-scopeprofile email https://www.googleapis.com/auth/developerprofiles https://www.googleapis.com/auth/developerprofiles.award https://www.googleapis.com/auth/devprofiles.full_control.firstparty
og:site_nameweb.dev
og:typewebsite
theme-color#3740ff
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og:imagehttps://web.dev/static/articles/preload-scanner/image/thumbnail.jpg
og:image:width1200
og:image:height675
og:localeen
twitter:cardsummary_large_image

Links:

Skip to main content https://web.dev/articles/preload-scanner#main-content
https://web.dev/
HTML https://web.dev/html
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Performance https://web.dev/performance
Accessibility https://web.dev/accessibility
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Learn HTML https://web.dev/learn/html
Learn CSS https://web.dev/learn/css
Learn JavaScript https://web.dev/learn/javascript
Learn AI https://web.dev/learn/ai
Learn Performance https://web.dev/learn/performance
Learn Accessibility https://web.dev/learn/accessibility
More courses https://web.dev/learn
AI and the web https://web.dev/explore/ai
Explore https://web.dev/explore
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Podcasts & shows https://web.dev/shows
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Articles https://web.dev/articles
https://web.dev/
Discover https://web.dev/discover
Baseline https://web.dev/baseline
How to use Baseline https://web.dev/how-to-use-baseline
Blog https://web.dev/blog
Case Studies https://web.dev/case-studies
HTML https://web.dev/html
CSS https://web.dev/css
JavaScript https://web.dev/javascript
Performance https://web.dev/performance
Accessibility https://web.dev/accessibility
Identity https://web.dev/identity
Learn HTML https://web.dev/learn/html
Learn CSS https://web.dev/learn/css
Learn JavaScript https://web.dev/learn/javascript
Learn AI https://web.dev/learn/ai
Learn Performance https://web.dev/learn/performance
Learn Accessibility https://web.dev/learn/accessibility
More courses https://web.dev/learn
AI and the web https://web.dev/explore/ai
Explore https://web.dev/explore
PageSpeed Insights https://pagespeed.web.dev/
Patterns https://web.dev/patterns
Podcasts & shows https://web.dev/shows
Developer Newsletter https://web.dev/newsletter
About web.dev https://web.dev/about
Home https://web.dev/
Articles https://web.dev/articles
GitHub https://github.com/malchata
LinkedIn https://www.linkedin.com/in/malchata
Homepage https://jlwagner.net/
tokenizeshttps://en.wikipedia.org/wiki/Lexical_analysis#Tokenization
an object modelhttps://developer.mozilla.org/docs/Web/API/Document_Object_Model
blocking resourcehttps://developer.chrome.com/docs/lighthouse/performance/render-blocking-resources
flash of unstyled content (FOUC)https://en.wikipedia.org/wiki/Flash_of_unstyled_content
type=module attributehttps://developer.mozilla.org/docs/Web/JavaScript/Guide/Modules#applying_the_module_to_your_html
A preload scanner's role is speculativehttps://html.spec.whatwg.org/multipage/parsing.html#speculative-html-parsing
this pagehttps://preload-scanner-fights.glitch.me/artifically-delayed-requests.html
WebPageTesthttps://www.webpagetest.org/
network waterfall charthttps://developer.chrome.com/docs/devtools/network/reference/#waterfall
a web pagehttps://preload-scanner-fights.glitch.me/artifically-delayed-requests.html
asynchttps://developer.mozilla.org/docs/Web/HTML/Element/script#attr-async
a web pagehttps://preload-scanner-fights.glitch.me/injected-async-script.html
a web pagehttps://preload-scanner-fights.glitch.me/inline-async-script.html
rel=preloadhttps://developer.mozilla.org/docs/Web/HTML/Link_types/preload
a web pagehttps://preload-scanner-fights.glitch.me/preloaded-injected-async-script.html
you can right click on the column headershttps://developer.chrome.com/docs/devtools/network/reference/#columns
an informative posthttps://www.igvita.com/2014/05/20/script-injected-async-scripts-considered-harmful/
a web pagehttps://preload-scanner-fights.glitch.me/js-lazy-load-suboptimal.html
Largest Contentful Paint (LCP)https://web.dev/articles/lcp
Optimizing Largest Contentful Painthttps://web.dev/articles/optimize-lcp
a web pagehttps://preload-scanner-fights.glitch.me/js-lazy-load-optimal.html