24 lines
775 B
TypeScript
24 lines
775 B
TypeScript
/**
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Create a type that represents either the value or the value wrapped in `PromiseLike`.
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Use-cases:
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- A function accepts a callback that may either return a value synchronously or may return a promised value.
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- This type could be the return type of `Promise#then()`, `Promise#catch()`, and `Promise#finally()` callbacks.
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Please upvote [this issue](https://github.com/microsoft/TypeScript/issues/31394) if you want to have this type as a built-in in TypeScript.
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@example
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```
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import {Promisable} from 'type-fest';
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async function logger(getLogEntry: () => Promisable<string>): Promise<void> {
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const entry = await getLogEntry();
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console.log(entry);
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}
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logger(() => 'foo');
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logger(() => Promise.resolve('bar'));
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```
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*/
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export type Promisable<T> = T | PromiseLike<T>;
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