Add shim for ES Promise #33863
Add shim for ES Promise #33863
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src/shims/promiseShim.ts
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| race<T>(promises: (T | PromiseLike<T>)[]): Promise<T>; | ||
| } | ||
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| export interface Promise<T> { |
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I, for one, look forward to Promise is not compatible with ts.Promise errors. 😄
This feels like a good time to just bump the lib version to es6 and shim runtime things as needed, rather than adding blocks of stuff onto the es5 lib.
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I'd be fine with having ts.Promise depend on the global native type information for Promise. What I don't want to do is have our shims insert themselves as the global implementations, as that could cause conflicts with other packages.
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Sure. I definitely just want to use the global Promise types, though.
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Just thought I'll drop an outside opinion: Are all theses inline shims really necessary? Supported Node versions already have Promise/Map/etc implemented. If older web browsers are the concern, wouldn't it be enough to document environment requirements in the Writing this because your time and work are precious to us, the community. :) |
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- If Type(value) is not Object, then
- Return FulfillPromise(promise, value).
The current implementation is closer to:
- If Type(value) is not Object or IsCallable(value) is true, then
- Return FulfillPromise(promise, value).
| try { | ||
| if (promise === value) throw new TypeError(); | ||
| // eslint-disable-next-line no-null/no-null | ||
| const then = typeof value === "object" && value !== null && (<Promise<unknown>>value).then; |
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| const then = typeof value === "object" && value !== null && (<Promise<unknown>>value).then; | |
| const then = ((typeof value === "object" && value !== null) || typeof value === "function") && (<Promise<unknown>>value).then; |
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@rbuckton is this still needed? |
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@sandersn This was to support async file writing in build mode, which is currently on hold. |
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To help with PR housekeeping, I'm going to close this draft PR. It's pretty old. |
This PR adds a shim for the ES Promise, which is needed for some performance-related future work.