先用v-bind:value將msg數據的更新綁定到input上,然後給input添加input事件,每次監聽輸出並更新msg的值,以此達到雙向綁定。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>自定義雙向綁定</title>
<script src="../vue.js"></script>
</head>
<body>
<div id="app">
<input type="text" :value="msg" @input="handleInput">
<span>{{msg}}</span>
</div>
<script>
var vm = new Vue({
el:"#app",
data: {
msg: "I am the message",
},
methods:{
handleInput:function () {
this.msg = event.target.value;
}
}
})
</script>
</body>
</html>