promise
ES6-compatible promise library. Promise/A+ implementation.
example
nodejs
var Promise = require('modulex-promise');readFilePromisified('config.json').then(function (text) { // (A) var obj = JSON.parse(text); console.log(JSON.stringify(obj, null, 4));}).catch(function (reason) { // (B) // File read error or JSON SyntaxError console.error('An error occurred', reason);});standalone
<script src="build/promise-standalone-debug.js"></script><script> (function (Promise) { function httpGet(url) { return new Promise( function (resolve, reject) { var request = new XMLHttpRequest(); request.onreadystatechange = function () { if (this.status === 200) { // Success resolve(this.response); } else { // Something went wrong (404 etc.) reject(new Error(this.statusText)); } } request.onerror = function () { reject(new Error( 'XMLHttpRequest Error: '+this.statusText)); }; request.open('GET', url); request.send(); }); } httpGet('http://example.com/file.txt') .then( function (value) { console.log('Contents: ' + value); }, function (reason) { console.error('Something went wrong', reason); }); })(XPromise);</script>