p-is-promise

Check if something is a promise

Why not is-promise? That module checks for a thenable, not an ES2015 promise. This one is stricter.

You most likely don't need this. Just pass your value to Promise.resolve() and let it handle it.

Can be useful if you need to create a fast path for a synchronous operation.

Install

$ npm install p-is-promise

Usage

import isPromise from 'p-is-promise';
import Bluebird from 'bluebird';

isPromise(Promise.resolve('🦄'));
//=> true

isPromise(Bluebird.resolve('🦄'));
//=> true

isPromise('🦄');
//=> false

Related

• is - Type check values
• More…

---

Get professional support for this package with a Tidelift subscription
_{Tidelift helps make open source sustainable for maintainers while giving companies
assurances about security, maintenance, and licensing for their dependencies.}