Concerns about `DOC_TYPES_MAPPING_GLOBALS`

[avivkeller]

I see a few issues with DOC_TYPES_MAPPING_GLOBALS:

1. As https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects grows over time, our DOC_TYPES_MAPPING_GLOBALS variable will be out-of-date. We should probably do one of:
   • (a) fetch the globals at runtime, or
   • (b) have a update:globals script that's run once a month to check the globals for updates, whose source of truth is:
     • (i) MDN
     • (ii) The globals.md file of Node.js's head branch¹
2. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects is, as far as I can tell, incomplete. It doesn't include things that are a part of Web APIs, like fetch, Crypto, and localStorage. It's also, expectedly, missing Node.js-specific globals like Buffer, __dirname, exports, etc. (See 1.b.ii)

Footnotes

1. When generating docs for older versions, this won't conflict, since they simply won't have the headers ↩