ran-boilerplate
Version:
React . Apollo (GraphQL) . Next.js Toolkit
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JavaScript
/**
* Copyright 2017 Google Inc.
*
* 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.
*/
var Deferred = /** @class */ (function () {
function Deferred() {
var _this = this;
this.promise = new Promise(function (resolve, reject) {
_this.resolve = resolve;
_this.reject = reject;
});
}
/**
* Our API internals are not promiseified and cannot because our callback APIs have subtle expectations around
* invoking promises inline, which Promises are forbidden to do. This method accepts an optional node-style callback
* and returns a node-style callback which will resolve or reject the Deferred's promise.
* @param {((?function(?(Error)): (?|undefined))| (?function(?(Error),?=): (?|undefined)))=} callback
* @return {!function(?(Error), ?=)}
*/
Deferred.prototype.wrapCallback = function (callback) {
var _this = this;
return function (error, value) {
if (error) {
_this.reject(error);
}
else {
_this.resolve(value);
}
if (typeof callback === 'function') {
// Attaching noop handler just in case developer wasn't expecting
// promises
_this.promise.catch(function () { });
// Some of our callbacks don't expect a value and our own tests
// assert that the parameter length is 1
if (callback.length === 1) {
callback(error);
}
else {
callback(error, value);
}
}
};
};
return Deferred;
}());
export { Deferred };
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