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vendors/es6-promise-polyfill/README.md

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+[![NPM version](https://img.shields.io/npm/v/es6-promise-polyfill.svg)](https://www.npmjs.com/package/es6-promise-polyfill)
+[![Build Status](https://travis-ci.org/lahmatiy/es6-promise-polyfill.svg?branch=master)](https://travis-ci.org/lahmatiy/es6-promise-polyfill)
+
+# ES6 Promise polyfill
+
+This is a polyfill of [ES6 Promise](https://github.com/domenic/promises-unwrapping). The implementation based on [Jake Archibald implementation](https://github.com/jakearchibald/es6-promise) a subset of [rsvp.js](https://github.com/tildeio/rsvp.js). If you're wanting extra features and more debugging options, check out the [full library](https://github.com/tildeio/rsvp.js).
+
+For API details and how to use promises, see the <a href="http://www.html5rocks.com/en/tutorials/es6/promises/">JavaScript Promises HTML5Rocks article</a>.
+
+## Notes
+
+The main target: implementation should be conformance with browser's implementations and to be minimal as possible in size. So it's strictly polyfill of ES6 Promise specification and nothing more.
+
+It passes both [Promises/A+ test suite](https://github.com/promises-aplus/promises-tests) and [rsvp.js test suite](https://github.com/jakearchibald/es6-promise/tree/master/test). And as small as 2,6KB min (or 1KB min+gzip).
+
+The polyfill uses `setImmediate` if available, or fallback to use `setTimeout`. Use [setImmediate polyfill](https://github.com/YuzuJS/setImmediate) by @YuzuJS to reach better performance.
+
+## How to use
+
+### Browser
+
+To install:
+
+```sh
+bower install es6-promise-polyfill
+```
+
+To use:
+
+```html
+<script src="bower_components/es6-promise-polyfill/promise.min.js"></script>
+<script>
+  var promise = new Promise(...);
+</script>
+```
+
+### Node.js
+
+To install:
+
+```sh
+npm install es6-promise-polyfill
+```
+
+To use:
+
+```js
+var Promise = require('es6-promise-polyfill').Promise;
+var promise = new Promise(...);
+```
+
+### AMD
+
+To install:
+
+```sh
+npm install es6-promise-polyfill
+```
+
+To use:
+
+```js
+define(['es6-promise-polyfill'], function(Promise) {
+  var promise = new Promise(...);
+});
+```
+
+## Usage in IE<9
+
+`catch` is a reserved word in IE<9, meaning `promise.catch(func)` throws a syntax error. To work around this, use a string to access the property:
+
+```js
+promise['catch'](function(err) {
+  // ...
+});
+```
+
+Or use `.then` instead:
+
+```js
+promise.then(undefined, function(err) {
+  // ...
+});
+```
+
+## License
+
+Licensed under the MIT License.