79 lines
2.2 KiB
JavaScript
79 lines
2.2 KiB
JavaScript
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"use strict";
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var Promise = require("./Promise");
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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/**
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* Copyright (c) 2013-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @typechecks
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*
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*/
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/**
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* Deferred provides a Promise-like API that exposes methods to resolve and
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* reject the Promise. It is most useful when converting non-Promise code to use
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* Promises.
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*
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* If you want to export the Promise without exposing access to the resolve and
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* reject methods, you should export `getPromise` which returns a Promise with
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* the same semantics excluding those methods.
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*/
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var Deferred = function () {
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function Deferred() {
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var _this = this;
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_classCallCheck(this, Deferred);
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this._settled = false;
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this._promise = new Promise(function (resolve, reject) {
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_this._resolve = resolve;
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_this._reject = reject;
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});
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}
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Deferred.prototype.getPromise = function getPromise() {
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return this._promise;
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};
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Deferred.prototype.resolve = function resolve(value) {
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this._settled = true;
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this._resolve(value);
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};
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Deferred.prototype.reject = function reject(reason) {
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this._settled = true;
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this._reject(reason);
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};
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Deferred.prototype["catch"] = function _catch(onReject) {
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return Promise.prototype["catch"].apply(this._promise, arguments);
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};
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Deferred.prototype.then = function then(onFulfill, onReject) {
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return Promise.prototype.then.apply(this._promise, arguments);
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};
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Deferred.prototype.done = function done(onFulfill, onReject) {
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// Embed the polyfill for the non-standard Promise.prototype.done so that
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// users of the open source fbjs don't need a custom lib for Promise
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var promise = arguments.length ? this._promise.then.apply(this._promise, arguments) : this._promise;
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promise.then(undefined, function (err) {
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setTimeout(function () {
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throw err;
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}, 0);
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});
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};
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Deferred.prototype.isSettled = function isSettled() {
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return this._settled;
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};
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return Deferred;
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}();
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module.exports = Deferred;
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