23 lines
665 B
JavaScript
23 lines
665 B
JavaScript
//#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
|
|
export { isPromise };
|