ND-PROMISE

💕 Lightweight ES6 Promise polyfill for the browser and node. Adheres closely to the spec. It is a perfect polyfill IE, Firefox or any other browser that does not support native promises.

This implementation is based on taylorhakes/promise-polyfill and then/promise. It has been changed to use the prototype for performance and memory reasons.

For API information about Promises, please check out this article HTML5Rocks article.

Browser Support

IE8+, Chrome, Firefox, IOS 4+, Safari 5+, Opera

Change Log

New in 3.0.3

Remove function bind; use rollup instead of webpack

New in 3.0.2

IE8 compatibility

New in 2.4.0

Rewrite core and test with ES6

New in 2.3.0

new Promise(function(resolve, reject, notify) {
  // resolve, reject, notify
}).then(function(value) {
  // do something
}).catch(function(error) {
  // do something
}).progress(function(value) {
  // do something
}).finally(function() {
  // do something
})

New in 2.2.0

new Promise(function(resolve, reject, notify) {
  notify(40)
  setTimeout(function() {
    notify(55)
  }, 50)
}).progress(function(value) {
  console.log(value)
})

Usage

cjs

$ npm install nd-promise

iife

• nd-promise minified

Example

const prom = new Promise(function(resolve, reject) {
  // do a thing, possibly async, then…
 
  if (/* everything turned out fine */) {
    resolve("Stuff worked!");
  }  else {
    reject(new Error("It broke"));
  }
});
 
// Do something when async done
prom.then(function() {
  ...
});

Testing

npm install
npm test

License

MIT