English
Trace standards, evidence, and implementation.
A reference surface for following Web technology claims together with their conditions, sources, verification state, and open issues.
EVIDENCE MODEL
Read normative claims separately from implementation
Each topic separates normative claims from observations made in browsers or accessibility trees. Unrun items are not treated as reviewed.
- SPEC — A claim checked against a standard
- IMPL — An implementation observation reproduced in a browser
- WPT — A Web Platform Tests mapping and execution result
- AAM — An accessibility-tree or assistive-technology observation
HTML topics
- HTML / ElementThe <progress> Element — Progress Values, Determinate State, and Accessibility
- HTML / ElementThe <template> Element — Template Contents, DocumentFragment, and Declarative Shadow DOM
- HTML / ElementThe <output> Element — Calculation Results, Form Association, and Submission Boundaries
- HTML / ElementThe <iframe> Element — Content Navigables, Sandboxing, and Accessibility
- HTML / ElementThe <dialog> Element — Modality, Focus, Close Requests, and the Top Layer
- HTML / ElementThe <details> Element — Disclosure, Open State, and Exclusive Groups
- HTML / ElementThe <optgroup> Element — Grouping, Label, and Disabled Boundary
- HTML / ElementThe <datalist> Element — Suggestions, Input Association, and Accessibility
- HTML / ElementThe <option> Element — Selectedness, Values, Submission, and Accessibility
- HTML / ElementThe <legend> Element — Fieldset Caption, Accessible Name, and Disabled Boundary
- HTML / ElementThe <fieldset> Element — Grouping, Disabled Propagation, and Accessible Name
- HTML / ElementThe <a> Element — Hyperlink Semantics, Conditions, and Processing
- HTML / ElementThe <button> Element — Type States, Form Processing, and Activation
- HTML / ElementThe <input> Element — Type States, Form Association, and Validation
- HTML / ElementThe <label> Element — Labelable Association, Activation, and Accessible Name
- HTML / ElementThe <form> Element — Form Owner, Submission, and Validation
- HTML / ElementThe <script> Element — Kinds, Timing, and Fetching
- HTML / ElementThe <select> Element — Option Selection, Form Submission, and Validation
- HTML / ElementThe <textarea> Element — Multiline Input, Values, and Validation
- HTML / ElementThe <table> Element — Table Model, Parser Recovery, and Accessibility
A beginner-friendly starting point
Start with clear explanations in Yugien, then move between Yugien and Atlas when you need conditions, evidence, or implementation differences.