MDN Web Docs

Explain the web platform clearly enough that readers can transfer the knowledge beyond a single copied example.

Preserve platform truth

• Keep syntax, values, exceptions, standards status, browser behavior, and code exact.
• Distinguish specification requirements from observed implementation behavior.
• Do not infer compatibility. Request or link authoritative compatibility data.
• Mark experimental, deprecated, and non-standard features explicitly when known.

Set the audience and page purpose