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Native Promise Only: A polyfill for native ES6 Promises **only**, nothing else.
The newest version!
/*! Native Promise Only
v0.8.1 (c) Kyle Simpson
MIT License: http://getify.mit-license.org
*/
(function UMD(name,context,definition){
// special form of UMD for polyfilling across evironments
context[name] = context[name] || definition();
if (typeof module != "undefined" && module.exports) { module.exports = context[name]; }
else if (typeof define == "function" && define.amd) { define(function $AMD$(){ return context[name]; }); }
})("Promise",typeof global != "undefined" ? global : this,function DEF(){
/*jshint validthis:true */
"use strict";
var builtInProp, cycle, scheduling_queue,
ToString = Object.prototype.toString,
timer = (typeof setImmediate != "undefined") ?
function timer(fn) { return setImmediate(fn); } :
setTimeout
;
// dammit, IE8.
try {
Object.defineProperty({},"x",{});
builtInProp = function builtInProp(obj,name,val,config) {
return Object.defineProperty(obj,name,{
value: val,
writable: true,
configurable: config !== false
});
};
}
catch (err) {
builtInProp = function builtInProp(obj,name,val) {
obj[name] = val;
return obj;
};
}
// Note: using a queue instead of array for efficiency
scheduling_queue = (function Queue() {
var first, last, item;
function Item(fn,self) {
this.fn = fn;
this.self = self;
this.next = void 0;
}
return {
add: function add(fn,self) {
item = new Item(fn,self);
if (last) {
last.next = item;
}
else {
first = item;
}
last = item;
item = void 0;
},
drain: function drain() {
var f = first;
first = last = cycle = void 0;
while (f) {
f.fn.call(f.self);
f = f.next;
}
}
};
})();
function schedule(fn,self) {
scheduling_queue.add(fn,self);
if (!cycle) {
cycle = timer(scheduling_queue.drain);
}
}
// promise duck typing
function isThenable(o) {
var _then, o_type = typeof o;
if (o != null &&
(
o_type == "object" || o_type == "function"
)
) {
_then = o.then;
}
return typeof _then == "function" ? _then : false;
}
function notify() {
for (var i=0; i 0) {
schedule(notify,self);
}
}
}
catch (err) {
reject.call(new MakeDefWrapper(self),err);
}
}
function reject(msg) {
var self = this;
// already triggered?
if (self.triggered) { return; }
self.triggered = true;
// unwrap
if (self.def) {
self = self.def;
}
self.msg = msg;
self.state = 2;
if (self.chain.length > 0) {
schedule(notify,self);
}
}
function iteratePromises(Constructor,arr,resolver,rejecter) {
for (var idx=0; idx