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HTML

              
                <!--
 * @Author: OBKoro1
 * @Github: https://github.com/OBKoro1
 * @Description: web worker博客演示denmo,博客链接:https://juejin.im/user/58714f0eb123db4a2eb95372/posts
 -->
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
  </head>

  <body>
    <div>打开控制台看输出</div>
  </body>
</html>

              
            
!

CSS

              
                
              
            
!

JS

              
                class webWorker {
  /**
   * @description: webworker的简单封装
   * @param {String} data js的url/script的id或class
   * @param {Object} type 默认值给出,同页面的web worker传个’worker‘即可
   * @return: WebWorker 对象
   */
  constructor(data, type = "url") {
    this.worker = null;
    this.workerInit(data, type);
  }
  workerInit(data, type) {
    if (type === "url") {
      // 默认是以url脚本形式的worker线程
      // 此时的data应该是一个url链接
      this.worker = new Worker(data);
    } else {
      // 以字符串形式创建worker线程,把代码字符串,转成二进制对象,生成 URL,加载URL
      const blob = new Blob([data]);
      const url = window.URL.createObjectURL(blob);
      this.worker = new Worker(url); // 加载
    }
  }
  /**
   * @description: 给worker线程发送消息
   * @param {*} data 要发送的数据
   */
  postMessage(data) {
    return this.worker.postMessage(data);
  }
  /**
   * @description: worker线程发送给主进程的数据
   * @param {Function} fn 把数据通过回调的形式传出去
   */
  onmessage(fn) {
    this.worker.onmessage = msg => {
      return fn(msg.data);
    };
  }
  // 主线程关闭worker线程
  closeWorker() {
    return this.worker.terminate();
  }
  /**
   * @description: 主线程监听worker线程的错误信息
   * @param {Function} fn 错误信息回调
   */
  errMsg(fn) {
    this.worker.onerror = e => {
      return fn(e);
    };
  }
}

const data = `
      // worker线程加载脚本 TODO: Worker 线程无法读取本地文件,加载的脚本必须来自网络
      // importScripts('hello1.js', 'http~.js');
      
      // 监听主线程传过来的信息
      self.onmessage = e => {
        console.log('主线程传来的信息:', e.data);
        // do something
      };
      
      // 发送信息给主线程
      self.postMessage('来自worker线程');
      
      // 关闭worker线程
      function closeSon() {
        return self.close();
      }`;

const worker = new webWorker(data, "script");
worker.onmessage(data => {
  console.log("父进程接收的数据:", data);
});
worker.postMessage("主进程传给worker线程");
worker.errMsg(msg => {
  console.log("worker线程报错:", msg);
});

              
            
!
999px

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