new-promise-capability.js•618 B
'use strict';
var aCallable = require('../internals/a-callable');
var $TypeError = TypeError;
var PromiseCapability = function (C) {
var resolve, reject;
this.promise = new C(function ($$resolve, $$reject) {
if (resolve !== undefined || reject !== undefined) throw new $TypeError('Bad Promise constructor');
resolve = $$resolve;
reject = $$reject;
});
this.resolve = aCallable(resolve);
this.reject = aCallable(reject);
};
// `NewPromiseCapability` abstract operation
// https://tc39.es/ecma262/#sec-newpromisecapability
module.exports.f = function (C) {
return new PromiseCapability(C);
};