hook.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <p>{{time}}</p>
        <p v-once>{{age}}</p>
        <input type="text" v-model="age">
        <p >{{!isOk?1:2}}</p>
        <h2 v-html="tagInfo"></h2>
       <img v-bind:src="pic" alt="">
       <a v-bind:href="page">xxxx</a>
       <p style="color: red;">实现功能：修过输入框，图片随着变化</p>
        <input type="text" v-model="picsrc">
        <p><img v-bind:src="picName+picsrc+picForamt" alt=""></p>
        
    </div>

    <script src="./js/vue.js"></script>
    <script>
        let vm=new  Vue({
            el:"#app",
            data:{
                time:new Date(),
                msg:'Connot read property of undefined',
                age:18,
                tagInfo:'<p style=color:red>我是标签文本</p>',
                isOk:true,
                pic:'./img/patient_pic.jpg',
                picName:'./img/pic',
                picForamt:'.jpg',
                picsrc:1,
                page:'xxxx.html',
            },
               
            beforeCreate() {
                
            },
            created() {
                
            },
            beforeMount() {
                
            },
            mounted() {
                if(true){
                this.page='xxx'
               }else{
                   this.page='xxx'
               }
            },
            beforeUpdate() {
              this.time=new Date();
              this.picsrc<4?this.picsrc++:this.picsrc=1
                // this.picsrc=''
            },
            updated() {
                
            },
            beforeDestroy() {
                
            },
            destroyed() {
                
            },
        })
    </script>
</body>
</html>