About this page

Selectors Level 4

https://w3.org/tr/selectors-4

“that takes an element in a tree structure and tests whether the element matches the selector or not. These expressions may be used for many things: directly on an element to test whether it matches some criteria, such as in the element.matches() function defined in [DOM] applied to an entire tree...” (from the page’s text)

Topic: Not categorised yet
Quality: Not rated yet
Language: English
Text on page: 124,586 characters
Page size: 490 kB
Answered: OK (200), HTML
Last read: 7 Jul 2025
In our index since: 7 Jul 2025
Safe search: Not checked yet
Links to it: Linked from 3 sites

More from w3.org

This site's best pages we know: ranked by how many other sites link to them.

W3C linked from 22 sites About ›
Web Content Accessibility Guidelines (WCAG) 2.1 linked from 19 sites About ›
WCAG 2 Overview | Web Accessibility Initiative (WAI) | W3C linked from 11 sites About ›
CSS Custom Properties for Cascading Variables Module Level 1 linked from 8 sites About ›
CSS Values and Units Module Level 4 linked from 6 sites About ›
Web Content Accessibility Guidelines (WCAG) 2.2 linked from 6 sites About ›
CSS Cascading and Inheritance Level 5 linked from 5 sites About ›
CSS Color Module Level 4 linked from 5 sites About ›

All pages from this site ›

Tools for this page

Other sites that can tell you more. Plain links: we don't track where you go.

Archive

Cached copy Internet Archive: every snapshot
archive.today second archive

About the site

Domain owner ICANN registration lookup
Certificates certificate transparency, subdomains
Safety check Safe Browsing status
Trackers The Markup's Blacklight
Is it down? for everyone, or just you

Discussions

Hacker News stories linking here
Reddit posts from this site
Wikipedia articles mentioning the site

For web makers

PageSpeed Lighthouse report
HTML validator W3C
Accessibility WAVE by WebAIM
Security headers

Who links to it

We haven't seen any links to this page yet. That usually means we haven't crawled the pages that link to it, not that there are none.

“Not rated yet” and similar notes are shown on purpose: we say what we haven't measured, so the page doesn't look emptier or better than it is.