Scrape more ECMAScript specifications

[Elchi3]

We currently only get to know about new ECMAScript builtins when they appear in the main ECMAScript spec. We also need to take into account Intl, proposals, and more.

The web-specs package can be helpful to find all of them:

const tc39specs = [
  ...web-specs
    .filter((spec) => spec.standing == 'good' && spec.url.includes('tc39'))
    .map((spec) => spec.url),
];
console.log(tc39specs);

Currently outputs:

[
  'https://tc39.es/ecma262/multipage/',
  'https://tc39.es/ecma402/',
  'https://tc39.es/proposal-array-from-async/',
  'https://tc39.es/proposal-array-grouping/',
  'https://tc39.es/proposal-arraybuffer-transfer/',
  'https://tc39.es/proposal-async-explicit-resource-management/',
  'https://tc39.es/proposal-decorators/',
  'https://tc39.es/proposal-explicit-resource-management/',
  'https://tc39.es/proposal-float16array/',
  'https://tc39.es/proposal-import-attributes/',
  'https://tc39.es/proposal-intl-duration-format/',
  'https://tc39.es/proposal-intl-locale-info/',
  'https://tc39.es/proposal-iterator-helpers/',
  'https://tc39.es/proposal-json-modules/',
  'https://tc39.es/proposal-json-parse-with-source/',
  'https://tc39.es/proposal-promise-with-resolvers/',
  'https://tc39.es/proposal-regexp-modifiers/',
  'https://tc39.es/proposal-set-methods/',
  'https://tc39.es/proposal-shadowrealm/',
  'https://tc39.es/proposal-source-phase-imports/',
  'https://tc39.es/proposal-temporal/',
  'https://tc39.es/source-map-spec/'
]

[queengooborg]

@Josh-Cena, would you have any interest in implementing this upstream in the es-scraper package?

[Josh-Cena]

Yes, I'll try. This is very, very hard, because many proposals are outdated and don't use the standard spec format (for example, they may use a diff format).

[queengooborg]

Different formats can definitely be annoying -- I see that one of them even uses an API spec format (https://tc39.es/source-map-spec/)!

Thank you very much, though, @Josh-Cena! Let us know if we can help out, I'd be more than happy to submit PRs to assist with this!

[Elchi3]

Thanks sooo much @Josh-Cena! My list above might be a bit verbose. For the moment, we are really only interested in specs that add additional builtins.

[Josh-Cena]

FWIW, I also manually manage a list of stage-3 specs: https://github.com/jc-verse/mdn-checker/blob/master/packages/mdn-checker/src/data/stage-3.ts