lovecoding
/
VIP24


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <button @click="change()">修改</button>
    <ul>
      <li v-for="(val,index) in arr">
        {{val}}
        {{index}}
      </li>
    </ul>
  </div>
  <script src="vue.js"></script>
  <script>
    new Vue({
      el: '#app',
      data:{
        arr:['a','b','c','d'],
        person:{
          name:'zs'
        }
      },
      methods:{
        change(){
          console.log(111)
          // this.arr[0] = 'x'
          /* Vue中  不能使用数组[索引]修改数组   因为页面不更新 */
          /* Vue 要大写 */
          /* Vue.set(data数据,修改值的索引,修改的参数) */
          Vue.set(this.person,'name','lisi')
        }  
      }
    })
  </script>
</body>
</html>