<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<!-- 1.导入vue -->
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<!-- 2.定义一个 标签 需要给一个标签添加 id -->
<div id="app">
<span>{{message}}</span>
<hr>
<a href="#" v-if="isLogin">欢迎你归来</a>
<hr>
<a href="#" v-if="level === 1">青铜</a>
<a href="#" v-else-if="level === 2">白银</a>
<a href="#" v-else>王者</a>
<hr>
<span v-if="seen">v-if</span> <br>
<span v-show="seen">v-show</span>
</div>
</body>
<!-- 3.创建vue实例 -->
<script type="text/javascript">
var vm = new Vue({
el:'#app',
data:{
message:'hello',
isLogin:false,
level:2,
seen:true,
}
})
</script>
</html>
