lovecoding
/
Web1020


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/vue.js"></script>
    <style>
        [v-cloak]{
            display: none;
        }
    </style>
</head>
<body>
    <div id="app">
       
        <!-- <div v-pre>
            {{num}}
        </div> -->
        <!-- v-once 仅加载一次 -->
        <!-- <h1 v-once>{{num}}</h1> -->
         <!-- v-cloak 优化首次加载的页面效果 -->
        <h1 v-cloak>{{num}}</h1>

        <button @click="changeNum">add</button>
    </div>
    <script>
        let app = new Vue({
            el:"#app",
            data:{
                num:10,
                str:"hello"
            },
            methods: {
                changeNum:function(){
                    this.num = 100
                }
            },
        })
    </script>
</body>
</html>