watch-监视路由地址的改变
<!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="/login">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
})
var vm=new Vue({
el:'#app',
data:{},
methods:{},
//router:routre
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>
