@fizzygalacticus/is-promise
v1.0.1 is promise determine if
is-promise
Helps determine if a value is a Promise.
Installation
yarn add @fizzygalacticus/is-promise
|| npm i @fizzygalacticus/is-promise
Usage
is-promise
returns an object with two values: promise
and uncertainty
. promise
will be true if there is a great chance that the value being tested is a promise. uncertainty
will be true if there is any uncertainty about whether or not the value is a promise.
const isPromise = require('@fizzygalacticus/is-promise');
const Q = require('q');
const Bluebird = require('bluebird');
const RSVP = require('rsvp');
const FakePromise = require('promise');
const results = isPromise(new Promise(resolve => resolve())); // { promise: true, uncertainty: false }
const results = isPromise(new Q(resolve => resolve())); // { promise: true, uncertainty: true }
const results = isPromise(new Bluebird(resolve => resolve())); // { promise: true, uncertainty: true }
const results = isPromise(new FakePromise(resolve => resolve())); // { promise: true, uncertainty: true }
const results = isPromise(new RSVP.Promise(resolve => resolve())); // { promise: true, uncertainty: true }
Notes
In order to be 100% certain that an object is a promise, you should stick to using native Node promises.
npm i @fizzygalacticus/is-promise
Source Code
github.com/FizzyGalacticus/i...Metadata
- MIT
- Whatever
- Dustin L. Dodson
- released 8/28/2019