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es6-promise

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es6-promise

A lightweight library that provides tools for organizing asynchronous code

    4.2.8latest

Version published
Maintainers
2
Weekly downloads
9,456,740
decreased by-5%

Weekly downloads

Readme

Source

ES6-Promise (subset of rsvp.js) Build Status

This is a polyfill of the ES6 Promise. The implementation is a subset of rsvp.js extracted by @jakearchibald, if you're wanting extra features and more debugging options, check out the full library.

For API details and how to use promises, see the JavaScript Promises HTML5Rocks article.

Downloads

CDN

To use via a CDN include this in your html:

<!-- Automatically provides/replaces `Promise` if missing or broken. --> <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/es6-promise.js"></script> <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/es6-promise.auto.js"></script> <!-- Minified version of `es6-promise-auto` below. --> <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/es6-promise.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/es6-promise.auto.min.js"></script>

Node.js

To install:

yarn add es6-promise

or

npm install es6-promise

To use:

var Promise = require('es6-promise').Promise;

Usage in IE<9

catch and finally are reserved keywords in IE<9, meaning promise.catch(func) or promise.finally(func) throw a syntax error. To work around this, you can use a string to access the property as shown in the following example.

However most minifiers will automatically fix this for you, making the resulting code safe for old browsers and production:

promise['catch'](function(err) { // ... }); promise['finally'](function() { // ... });

Auto-polyfill

To polyfill the global environment (either in Node or in the browser via CommonJS) use the following code snippet:

require('es6-promise').polyfill();

Alternatively

require('es6-promise/auto');

Notice that we don't assign the result of polyfill() to any variable. The polyfill() method will patch the global environment (in this case to the Promise name) when called.

Building & Testing

You will need to have PhantomJS installed globally in order to run the tests.

npm install -g phantomjs

  • npm run build to build
  • npm test to run tests
  • npm start to run a build watcher, and webserver to test
  • npm run test:server for a testem test runner and watching builder

Keywords

FAQs

What is es6-promise?

A lightweight library that provides tools for organizing asynchronous code

Is es6-promise popular?

The npm package es6-promise receives a total of 8,919,571 weekly downloads. As such, es6-promise popularity was classified as popular.

Is es6-promise well maintained?

We found that es6-promise demonstrated a not healthy version release cadence and project activity because the last version was released a year ago.It has 2 open source maintainers collaborating on the project.

Last updated on 06 Jun 2019

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