plite

plite

Tiny, fast, light-weight JavaScript promises.

• Less than 500 bytes gzipped and minified
• Super fast http://jsperf.com/plite/14
• Faster than native in many cases

Usage

Plite should work as a shim for ES6 promises, if you do this:

!this.Promise && (this.Promise = Plite);

Create a resolved promise:

Plite.resolve(data);

Create a rejected promise:

Plite.reject(err);

Resolve a promise after a bit:

Plite(function (resolve) {
  setTimeout(function () {
    resolve('all done!');
  }, 100);
});

Reject a promise after a bit:

Plite(function (resolve, reject) {
  setTimeout(function () {
    reject('Ruh roh!');
  }, 100);
});

Promises supports chaining:

var p = Plite.resolve('Hurrah!');

p.then(function (msg) {
  return msg + ' on ' + new Date().toString();
}).then(function (msg) {
  alert('GOOD: ' + msg);
}).catch(function (err) {
  alert('ERR: ' + err);
});

Race and All

All works as documented in MDN.

So does race.

With the caveat that the iterable argument is treated as an array. So:

Plite.all([promise1, promise2]).then(function (data) {
  // data is the array of values that the promises resolved to...
}).catch(function (err) {
  // err is the error of to the first failed promise in the array
});

Installation

Include plite.min.js

Or install using NPM:

npm install plite

Or install using Bower:

bower install plite

License MIT

Copyright (c) 2015 Chris Davies

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.