• Vue--watch控制监听路由地址-组件的变化----'$route.path': function (newVal, oldVal)


    <!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>
      <script src="./lib/vue-2.4.0.js"></script>
      <!-- 1. 导入包 -->
      <script src="./lib/vue-router-3.0.1.js"></script>
    </head>

    <body>
      <div id="app">
        <router-link to="/login">登录</router-link>
        <router-link to="/register">注册</router-link>

        <!-- 容器 -->
        <router-view></router-view>

      </div>

      <script>
        // 2. 创建子组件
        var login = {
          template: '<h3>这是登录子组件,这个组件是 奔波霸 开发的。</h3>'
        }

        var register = {
          template: '<h3>这是注册子组件,这个组件是 霸波奔 开发的。</h3>'
        }

        // 3. 创建一个路由对象
        var router = new VueRouter({
          routes: [ // 路由规则数组
            { path: '/', redirect: '/login' },
            { path: '/login', component: login },
            { path: '/register', component: register }
          ],
          linkActiveClass: 'myactive' // 和激活相关的类
        })

        // 创建 Vue 实例,得到 ViewModel
        var vm = new Vue({
          el: '#app',
          data: {},
          methods: {},
          // router: router
          router,
          watch: {
            //  this.$route.path
            '$route.path': function (newVal, oldVal) {
              // console.log(newVal + ' --- ' + oldVal)
              if (newVal === '/login') {
                console.log('欢迎进入登录页面')
              } else if (newVal === '/register') {
                console.log('欢迎进入注册页面')
              }
            }
          }
        });
      </script>
    </body>

    </html>
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  • 原文地址:https://www.cnblogs.com/fdxjava/p/11617789.html
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