PCancelable.js
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'use strict';
var global = (function () {
if (typeof globalThis !== 'undefined') {
return globalThis;
} else if (typeof global !== 'undefined') {
return global;
} else if (typeof self !== 'undefined') {
return self;
} else if (typeof window !== 'undefined') {
return window;
} else {
return Function('return this')();
}
})();
var Symbol = global['jest-symbol-do-not-touch'] || global.Symbol;
Object.defineProperty(exports, '__esModule', {
value: true
});
exports.default = void 0;
var global = (function () {
if (typeof globalThis !== 'undefined') {
return globalThis;
} else if (typeof global !== 'undefined') {
return global;
} else if (typeof self !== 'undefined') {
return self;
} else if (typeof window !== 'undefined') {
return window;
} else {
return Function('return this')();
}
})();
var Symbol = global['jest-symbol-do-not-touch'] || global.Symbol;
var global = (function () {
if (typeof globalThis !== 'undefined') {
return globalThis;
} else if (typeof global !== 'undefined') {
return global;
} else if (typeof self !== 'undefined') {
return self;
} else if (typeof window !== 'undefined') {
return window;
} else {
return Function('return this')();
}
})();
var Promise = global[Symbol.for('jest-native-promise')] || global.Promise;
function _defineProperty(obj, key, value) {
if (key in obj) {
Object.defineProperty(obj, key, {
value: value,
enumerable: true,
configurable: true,
writable: true
});
} else {
obj[key] = value;
}
return obj;
}
/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
class CancelError extends Error {
constructor() {
super('Promise was canceled');
this.name = 'CancelError';
}
}
class PCancelable {
constructor(executor) {
_defineProperty(this, '_pending', true);
_defineProperty(this, '_canceled', false);
_defineProperty(this, '_promise', void 0);
_defineProperty(this, '_cancel', void 0);
_defineProperty(this, '_reject', () => {});
this._promise = new Promise((resolve, reject) => {
this._reject = reject;
return executor(
fn => {
this._cancel = fn;
},
val => {
this._pending = false;
resolve(val);
},
err => {
this._pending = false;
reject(err);
}
);
});
}
then(onFulfilled, onRejected) {
return this._promise.then(onFulfilled, onRejected);
}
catch(onRejected) {
return this._promise.catch(onRejected);
}
cancel() {
if (!this._pending || this._canceled) {
return;
}
if (typeof this._cancel === 'function') {
try {
this._cancel();
} catch (err) {
this._reject(err);
}
}
this._canceled = true;
this._reject(new CancelError());
}
}
exports.default = PCancelable;