示例代码
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>vue修改数组元素方法</title>
</head>
<body>
<div id="root">
<div v-for="item in arr">
{{ item }}
</div>
<button @click="changeArr1">修改数组元素方法--方法一</button>
<button @click="changeArr2">修改数组元素方法--方法二</button>
<button @click="changeArr3">修改数组元素方法--方法三</button>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script type="text/javascript">
var vm = new Vue({
el: '#root',
data: {
arr: [1, 2, 3]
},
methods: {
changeArr1: function() {
Vue.set(vm.arr, 0, '方法一');
},
changeArr2: function() {
vm.$set(vm.arr, 0, '方法二');
},
changeArr3: function() {
this.arr.splice(0, 1, '方法三');
//vm.arr.splice(0,1,'方法三');
}
}
});
</script>
</body>
</html>