com.google.javascript.jscomp.js.es6.promise.allSettled.js Maven / Gradle / Ivy
/*
* Copyright 2019 The Closure Compiler Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview
* @suppress {uselessCode}
*/
'require util/polyfill';
'require es6/promise/promise';
'require es6/array/from';
$jscomp.polyfill('Promise.allSettled', function(orig) {
if (orig) return orig;
/**
* @param {*} value
* @return {{status: string, value: *}}
*/
function fulfilledResult(value) {
return {status: 'fulfilled', value: value};
}
/**
* @param {*} reason
* @return {{status: string, reason: *}}
*/
function rejectedResult(reason) {
return {status: 'rejected', reason: reason};
}
/**
* These types are weaker than they could be, but they're strong enough for
* this context.
* @this {typeof Promise}
* @param {!Iterable<*>} thenablesOrValues
* @return {!Promise>}
*/
var polyfill = function(thenablesOrValues) {
// The spec requires allSettled to be called directly on the Promise
// constructor, which is consistent with its requirement for Promise.all().
/** @type {typeof Promise} */
var PromiseConstructor = this;
/**
* @param {*} maybeThenable
* @return {!Promise<*>}
*/
function convertToAllSettledResult(maybeThenable) {
return PromiseConstructor.resolve(maybeThenable)
.then(fulfilledResult, rejectedResult);
}
// Create an array of promises that resolve to the appropriate result
// objects and never reject.
var wrappedResults =
Array.from(thenablesOrValues, convertToAllSettledResult);
return PromiseConstructor.all(wrappedResults);
};
return polyfill;
}, 'es_2020', 'es3');