promise like

@nick/is/promise-like

isPromiseLike

Signature

function isPromiseLike<T>(it: unknown): it is PromiseLike<T>;

Check if the given value is a PromiseLike type, which includes both native Promise instances and custom promise-like objects with a .then method (sometimes referred to as "thenables").

Parameters

Name	Info
it	The value to check.

Returns

true if the value is a PromiseLike, false otherwise.

Category

Async/Await

Examples

import { isPromiseLike } from "jsr:@nick/is/promise-like";

console.log(isPromiseLike(Promise.resolve())); // true
console.log(isPromiseLike({ then: () => {} })); // true
console.log(isPromiseLike({})); // false