promise.js
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/**
* Promise adapter.
*/
import PromiseLib from './lib/promise';
if (typeof Promise === 'undefined') {
window.Promise = PromiseLib;
}
export default function PromiseObj(executor, context) {
if (executor instanceof Promise) {
this.promise = executor;
} else {
this.promise = new Promise(executor.bind(context));
}
this.context = context;
}
PromiseObj.all = function (iterable, context) {
return new PromiseObj(Promise.all(iterable), context);
};
PromiseObj.resolve = function (value, context) {
return new PromiseObj(Promise.resolve(value), context);
};
PromiseObj.reject = function (reason, context) {
return new PromiseObj(Promise.reject(reason), context);
};
PromiseObj.race = function (iterable, context) {
return new PromiseObj(Promise.race(iterable), context);
};
var p = PromiseObj.prototype;
p.bind = function (context) {
this.context = context;
return this;
};
p.then = function (fulfilled, rejected) {
if (fulfilled && fulfilled.bind && this.context) {
fulfilled = fulfilled.bind(this.context);
}
if (rejected && rejected.bind && this.context) {
rejected = rejected.bind(this.context);
}
return new PromiseObj(this.promise.then(fulfilled, rejected), this.context);
};
p.catch = function (rejected) {
if (rejected && rejected.bind && this.context) {
rejected = rejected.bind(this.context);
}
return new PromiseObj(this.promise.catch(rejected), this.context);
};
p.finally = function (callback) {
return this.then(function (value) {
callback.call(this);
return value;
}, function (reason) {
callback.call(this);
return Promise.reject(reason);
}
);
};