js实现hash路由原理

一、简单的上下布局，点击左侧导航，中间内容跟对变化，主要技术使用js检测路由的onhashchange事件

效果图

二、话不多说，直接上代码

<!DOCTYPE html>
<html lang="zh">

<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>hash路由原理</title>
  <style>
    body,
    html {
      margin: 0;
      width: 100%;
      height: 100%
    }

    .header {
      margin-left: 200px;
      height: 50px;
      line-height: 50px;
      text-align: center;
      font-size: 26px;
      box-shadow: 0 1px 4px #32598913;
    }

    .layout {
      height: calc(100% - 50px);
    }

    .layout>.layout_sidebar {
      position: fixed;
      left: 0px;
      top: 0px;
      bottom: 0px;
      width: 200px;
      height: 100%;
      z-index: 10;
      background: #001529;
    }

    .layout_sidebar>a {
      display: block;
      height: 50px;
      display: flex;
      justify-content: center;
      align-items: center;
      text-decoration: none;
      color: #cecece;
      border-bottom: 1px solid rgba(129, 129, 129, 0.3);
    }

    .layout>.layout_main {
      margin-left: 200px;
      padding: 16px;
    }

    #main {
      height: calc(100% - 60px);
      width: calc(100% - 200px);
      background: #198;
      margin-left: 200px;
    }
  </style>
</head>

<body>
  <div class="header">hash 路由原理</div>
  <div class="layout">
    <div class="layout_sidebar">
      <a href="#/">默认页面</a>
      <a href="#/a">页面一</a>
      <a href="#/b">页面二</a>
      <a href="#/c">页面三</a>
      <a href="#/d">页面五</a>
      <a href="#/e">页面六</a>
      <a href="#/f">页面七</a>
      <a href="#/g">页面八</a>
    </div>
    <div class="layout_main">
      <div id="com_page"><b>默认值</b></div>
    </div>
  </div>


  <script>
    // 对应的页面组件内容数据
    let router = [{
      path: '/',
      component: "<b>默认页面</b>"
    },
    {
      path: '/a',
      component: "<b>页面一页面一页面一页面一</b>"
    },
    {
      path: '/b',
      component: "<b>页面二页面二页面二页面二</b>"
    },
    {
      path: '/c',
      component: "<b>页面三页面三页面三页面三</b>"
    },
    {
      path: '/d',
      component: "<b>页面五页面五页面五页面五</b>"
    },
    {
      path: '/e',
      component: "<b>页面六页面六页面六页面六</b>"
    },
    {
      path: '/f',
      component: "<b>页面七页面七页面七页面七</b>"
    },
    {
      path: '/g',
      component: "<b>页面八页面八页面八页面八</b>"
    }
    ]


    window.onload = function () {

      let hashRouter = {
        path: "/"
      }

      hashRouter.init = function (hash) {
        // 获取路径
        let path = hash.substring(1)
        // 查到对应的路径
        router.map(function (el, index) {
          if (path == el.path) {
            return loadContent(el.component)
          }
        })
      }

      // 加载对应的内容
      function loadContent(con) {
        document.getElementById("com_page").innerHTML = con
      }

      // 初始化执行
      hashRouter.init(location.hash)

      // 监听hash被改变
      window.onhashchange = function () {
        hashRouter.init(location.hash)
      }
    }
  </script>
</body>

</html>