es-toolkit/dist/predicate/isPromise.js

A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.

//#region src/predicate/isPromise.ts
/**
* Checks if a given value is `Promise`.
*
* This function can also serve as a type predicate in TypeScript, narrowing the type of the argument to `Promise`.
*
* @param value The value to check if it is a `Promise`.
* @returns Returns `true` if `value` is a `Promise`, else `false`.
*
* @example
* const value1 = new Promise((resolve) => resolve());
* const value2 = {};
* const value3 = 123;
*
* console.log(isPromise(value1)); // true
* console.log(isPromise(value2)); // false
* console.log(isPromise(value3)); // false
*/
function isPromise(value) {
	return value instanceof Promise;
}
//#endregion
exports.isPromise = isPromise;