Sitelab · Code Modernity Analysis
Examines a site's CSS, JavaScript and HTML and dates how current it is, year by year, while detecting the technologies and libraries in use.
Sitelab reads the markup in your HTML document and dates it by the year each element became available. The catalog below groups those elements by era so you can see where your markup sits.
Newly spreading (2023+)
Modern markup
<dialog>popover<search>loading=lazyfetchpriorityinert<selectlist> (proposal)
Modern baseline expectations
Standard today
responsive <img srcset><picture>decoding=asyncsemantic landmarksaria-* accessibility<details>/<summary>
The HTML5 foundation (2014)
A solid base
<header>/<nav>/<main>/<footer><article>/<section><video>/<audio>input types (email, date)data-* attributes
The bridge era
Ageing patterns
XHTML doctypelayout with <table> (residual)heavy inline styles
What costs you points
Should be abandoned
<font><center><marquee>unclosed tagsmissing altquirks mode
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