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备稿计划: TypeScript 支持 Awaited<T> #100

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iugo opened this issue Sep 10, 2021 · 0 comments
Open

备稿计划: TypeScript 支持 Awaited<T> #100

iugo opened this issue Sep 10, 2021 · 0 comments

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@iugo
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iugo commented Sep 10, 2021 •
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之前, Promise 和 Promise<Promise> 是两个不同的类型.

以前, Promise<Promise<T>>.then(v => type v is Promise<T>).
想要解决这个问题可以通过 await Promise<Promise<T>> 拿到 T.

现在, 终于可以不用再为这个操心了.

microsoft/TypeScript#45350

用法举例: https://www.typescriptlang.org/play?ts=4.5.0-dev.20210910#code/C4TwDgpgBGULxQAoCcD2BbAlgZwgHgDsBXdAIwmQD4BuAKFEigEN4oBBAdyc2AgBM8YGrSA
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