代码
<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Vue.js 监听属性-千米与米之间的换算</title>
<script src="//static.gzj2001.com/vue/vue.js"></script>
</head>
<body>
<div id="app">
米<input type="text" v-model="mi">
千米<input type="text" v-model="km">
</div>
<script>
new Vue({
el:"#app",
data:{
mi:0,
km:0
},
watch:{
km:function(val){
this.km = val;
this.mi = val * 1000;
},
mi:function(cs){
this.mi = cs;
this.km = cs / 1000;
}
}
})
</script>
</body>
</html>