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authorruki <waruqi@gmail.com>2018-11-08 00:38:48 +0800
committerruki <waruqi@gmail.com>2018-11-07 21:53:09 +0800
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parent2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff)
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+/** @license MIT License (c) copyright 2010-2014 original author or authors */
+/** @author Brian Cavalier */
+/** @author John Hann */
+
+(function(define) { 'use strict';
+define(function() {
+
+ return function addWith(Promise) {
+ /**
+ * Returns a promise whose handlers will be called with `this` set to
+ * the supplied receiver. Subsequent promises derived from the
+ * returned promise will also have their handlers called with receiver
+ * as `this`. Calling `with` with undefined or no arguments will return
+ * a promise whose handlers will again be called in the usual Promises/A+
+ * way (no `this`) thus safely undoing any previous `with` in the
+ * promise chain.
+ *
+ * WARNING: Promises returned from `with`/`withThis` are NOT Promises/A+
+ * compliant, specifically violating 2.2.5 (http://promisesaplus.com/#point-41)
+ *
+ * @param {object} receiver `this` value for all handlers attached to
+ * the returned promise.
+ * @returns {Promise}
+ */
+ Promise.prototype['with'] = Promise.prototype.withThis = function(receiver) {
+ var p = this._beget();
+ var child = p._handler;
+ child.receiver = receiver;
+ this._handler.chain(child, receiver);
+ return p;
+ };
+
+ return Promise;
+ };
+
+});
+}(typeof define === 'function' && define.amd ? define : function(factory) { module.exports = factory(); }));
+