Inquiry Regarding Web API Type Support Based on Browser Compatibility Standards

[MomoseMitsuki]

Is there a specific set of compatibility guidelines or standards that TypeScript follows when deciding which Web APIs to include for type support? or, does TypeScript rely on any authoritative sources (e.g., W3C specifications, Can I Use, MDN Web Docs) to determine browser compatibility when adding or omitting API type definitions?

[MartinJohns]

For DOM related types: https://github.com/microsoft/typescript-dom-lib-generator

For general JavaScript types: when they're at least stage 3 and not experimental.

[guest271314]

I don't think anything is stopping you from creating your own types.