[selectors-4] :defined (original) (raw)

Skip to content

Navigation Menu

Sign in

Appearance settings

• • AI CODE CREATION
    * GitHub CopilotWrite better code with AI
    * GitHub SparkBuild and deploy intelligent apps
    * GitHub ModelsManage and compare prompts
    * MCP RegistryNewIntegrate external tools
  • DEVELOPER WORKFLOWS
    * ActionsAutomate any workflow
    * CodespacesInstant dev environments
    * IssuesPlan and track work
    * Code ReviewManage code changes
  • APPLICATION SECURITY
    * GitHub Advanced SecurityFind and fix vulnerabilities
    * Code securitySecure your code as you build
    * Secret protectionStop leaks before they start
  • EXPLORE
    * Why GitHub
    * Documentation
    * Blog
    * Changelog
    * Marketplace

View all features

• • BY COMPANY SIZE
    * Enterprises
    * Small and medium teams
    * Startups
    * Nonprofits
  • BY USE CASE
    * App Modernization
    * DevSecOps
    * DevOps
    * CI/CD
    * View all use cases
  • BY INDUSTRY
    * Healthcare
    * Financial services
    * Manufacturing
    * Government
    * View all industries

View all solutions

• • EXPLORE BY TOPIC
    * AI
    * Software Development
    * DevOps
    * Security
    * View all topics
  • EXPLORE BY TYPE
    * Customer stories
    * Events & webinars
    * Ebooks & reports
    * Business insights
    * GitHub Skills
  • SUPPORT & SERVICES
    * Documentation
    * Customer support
    * Community forum
    * Trust center
    * Partners
• • COMMUNITY
    * GitHub SponsorsFund open source developers
  • PROGRAMS
    * Security Lab
    * Maintainer Community
    * Accelerator
    * Archive Program
  • REPOSITORIES
    * Topics
    * Trending
    * Collections
• • ENTERPRISE SOLUTIONS
    * Enterprise platformAI-powered developer platform
  • AVAILABLE ADD-ONS
    * GitHub Advanced SecurityEnterprise-grade security features
    * Copilot for BusinessEnterprise-grade AI features
    * Premium SupportEnterprise-grade 24/7 support
• Pricing

Provide feedback

We read every piece of feedback, and take your input very seriously.

Include my email address so I can be contacted

Saved searches

Use saved searches to filter your results more quickly

Sign in

Sign up

Appearance settings

w3c / csswg-drafts Public

• Notifications You must be signed in to change notification settings

• Fork759

• Star 4.8k

• Code

• Issues 4.1k

• Pull requests 115

• Actions

• Projects 12

• Security

• Insights

Additional navigation options

New issue

New issue

Closed

Closed

[selectors-4] :defined

#2258

Labels

Needs Editsselectors-4Current Work

Description

annevk

opened

on Feb 2, 2018

HTML defines :defined: https://html.spec.whatwg.org/multipage/semantics-other.html#selector-defined.

1. Is that enough for a definition of a new pseudo-class?
2. Is it fine for HTML to define this?
3. Should Selectors contain a registry of externally defined selectors?

(I'm asking this in part since we're considering a :heading(level) pseudo-class.)

See also: WICG/webcomponents#665.

cc @domenic @snuggs

Metadata

Metadata

Assignees

No one assigned

Labels

Needs Editsselectors-4Current Work

Type

No type

Projects

No projects

Milestone

No milestone

Relationships

None yet

Development

No branches or pull requests

Issue actions