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web-worker-sample's Introduction

Web Worker && Shared Web Worker

a sample to demonstrate differences between Web Worker and Shared Worker

Web Worker & Shared Worker 的异同

相同点

  • 只能在web网页中使用,也就是http(s):// 协议下访问的站点中使用,file:// 协议下访问本地文件无法使用 错误示例
  • 两种类似于多线程的js实现
  • 通过消息传递的方式来互相通信

不同点

  • Shared Worker通过port来发送消息,Web Worker直接发送消息
  • 浏览器会为Web Worker引用的js文件创建单独的线程,因此不同的页面引用的同一个js文件是在不同的进程中的单独线程中执行的而Shared Worker引用的js文件会在浏览器创建的单独的进程中执行,而且被不同的页面引用的相同的js文件只会加载一次且共享

启动示例

npm i

npm run start

打开浏览器访问 http://localhost:9090

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