Reference cards for the open web platform
w3c.wiki is a community-edited encyclopedia of Web standards. Each entry links to the normative specification and shows what a conforming implementation looks like for end users — without vendor pitches and without commercial calls to action.
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- ARIA states and properties
- HTML <form> element and submission semantics
- ARIA landmark roles and structure
- ARIA roles: a vocabulary for assistive technology
- The HTML <dialog> element
- CSS color spaces and contrast
- CSS layout primitives: flow, flex, grid, container
- HTML semantic elements
- Fetch API: requests, responses, streaming, and abort
- Service workers: registration, lifecycle, fetch handling