Vue-22、总结Vue数据监测

1、功能

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<head><meta charset="UTF-8"><title>Vue总结数据监测</title><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
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<div id="root"><hr/><h1 >学生信息</h1><button @click="student.age++">年龄+1岁</button><button @click="addsex">点击添加学生性别</button><button @click="student.sex='女'">点击修改学生性别</button><button @click="addFirstFriend">在列表首位添加一个朋友</button><button @click="updateFirstName">修改第一个朋友的名字为张三</button><button @click="addHobby">添加一个爱好</button><button @click="updateHobby">修改第一个爱好为：开车</button><h2>学生名字：{{student.name}}</h2><h2 v-if="student.sex">性别：{{student.sex}}</h2><h2>学生年龄：{{student.age}}</h2><hr/><h2>学生爱好</h2><ul><li v-for="p in student.hobby">{{p}}</li></ul><h2>学生朋友们</h2><h2><ul><li v-for="(p,index) in student.friends" :key="index"> {{p.name}}--{{p.age}}</li></ul></h2>
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<script type="text/javascript">Vue.config.productionTip=false;const vm = new Vue({el:"#root",data:{student:{name: 'tom',age:18,hobby:['抽烟','喝酒','烫头'],friends:[{name:'jeery',age:35},{name:'tony',age:36}]}},methods:{addsex(){// Vue.set(this.student,'sex','男')this.$set(this.student,'sex','男');},addFirstFriend(){this.student.friends.unshift({name:'李四',age:36});},updateFirstName(){this.student.friends[0].name="张三";},addHobby(){this.student.hobby.unshift('抽烟');},updateHobby(){this.student.hobby.splice(0,1,'开车');// Vue.set(this.student.hobby,0,'开车');// this.$set(this.student.hobby,0,'开车')},}})
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