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router-principle's Introduction

router原理简单封装

注: 1.demo为react-router-dom 2.使用 source为封装代码，核心代码在src/router

我们只关心两件事：

  • 1.点击超链接是否会跳转
  • 2.点击浏览器前进/后退是否能达到页面不刷新，且地址栏变化且组件产生变化

hash路由原理

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当为hash模式时，浏览器不管在超链接跳转和地址栏变化，都会执行hashchange，所以我们只需监听hashchange进行相应的处理

history路由原理

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当为history模式时，超链接跳转时阻止a标签的默认事件，进行处理

前进后退时监听popstate，进行页面以及地址栏变化

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