JavaScript 模拟后台任务

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 * Copyright 2015 Google Inc. All rights reserved.

 *

 * 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.

 */

/*

 * @see https://developers.google.com/web/updates/2015/08/using-requestidlecallback

 */

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  function (cb) {

    var start = Date.now();

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        didTimeout: false,

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        }

      });

    }, 1);

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JavaScript 模拟后台任务

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