lovecoding
/
VIP26


			
				
					
						
						
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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>
  </head>
  <body>
    <style>
      button {
        margin-top: 10px;
      }
    </style>

    <div id="root">
      <h1>学生信息</h1>
      <button @click="addAge">年龄+1岁</button> <br />
      <button @click="addSex">添加性别属性，默认值：男</button> <br />
      <button @click="updateSex">修改性别</button> <br />
      <button @click="addFriend">在列表首位添加一个朋友</button> <br />
      <button @click="updateFirstFriendName">
        修改第一个朋友的名字为：张三
      </button>
      <br />
      <button @click="addHobby">添加一个爱好</button> <br />
      <button @click="updateHobby">修改第一个爱好为：开车</button> <br />
      <button @click="removeSmoke">过滤掉爱好中的抽烟</button> <br />
      <h3>姓名：{{ student.name }}</h3>
      <h3>年龄：{{ student.age }}</h3>
      <h3 v-if="student.sex">性别：{{student.sex}}</h3>
      <h3>爱好：</h3>
      <ul>
        <li v-for="(h,index) in student.hobby" :key="index">{{ h }}</li>
      </ul>
      <h3>朋友们：</h3>
      <ul>
        <li v-for="(f,index) in student.friends" :key="index">
          {{ f.name }}--{{ f.age }}
        </li>
      </ul> 
    </div>
    <script src="./vue.js"></script>
    <script type="text/javascript">
      const vm = new Vue({
        el: "#root",
        data: {
          student: {
            name: "tom",
            age: 18,
            hobby: ["抽烟", "喝酒", "烫头"],
            friends: [
              { name: "jerry", age: 35 },
              { name: "tony", age: 36 },
            ],
          },
        },
        methods: {
            addAge() {
                 this.student.age++;
            },
            addSex() {
                this.$set(this.student,'sex','男');
            },
            updateSex() {
                this.$set(this.student,'sex','未知');
            },
            addFriend() {
                this.student.friends.unshift({name:"Jack",age:21});
            },
            updateFirstFriendName() {
                this.student.friends[0].name = '张三';
            },
            addHobby() {
                this.student.hobby.push("于谦");
            },
            updateHobby() {
                this.$set(this.student.hobby,0,'开车');
            },
            removeSmoke() {
                // this.student.hobby = this.student.hobby.filter((item) => {
                //     return item != '抽烟';
                // })
                this.student.hobby.splice(0,1)
            }
        },
      });
    </script>
  </body>
</html>