Usage

isPromise(Promise.resolve(1)); // => true
isPromise({ then() {} }); // => true
isPromise(1); // => false

Installation

CLI

npx atmx add helper is-promise

Manually

Copy and paste the following method into @/utils/helpers/undefined.ts:

import { isFunction } from "@/helpers/is-function.ts";

/**
* Returns true if the value is a Promise or has a `then` method.
*
* @example
* isPromise(Promise.resolve(1)) // => true
* isPromise({ then() {} }) // => true
* isPromise(1) // => false
*/
export function isPromise(value: any): value is Promise<any> {
return !!value && isFunction(value.then);
}