摘要：<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width,
<!DOCTYPE html>
<html lang="en">
<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>Document</title>
</head>
<body>
<div id="box">
input里面輸入值，從而改變結(jié)果<br>
{{num1}}+<input type="text" v-model="num2">={{num3}}
</div>
<script src="js/Vue.js"></script>
<script>
new Vue({
el:'#box',
data:{
num1:'1',
num2:'2',
num3:''
},
watch:{
num2:function(){
return this.num3=Math.floor(this.num1)+Math.floor(this.num2);
}
}
})
</script>
</body>
</html>請(qǐng)問(wèn)老師，默認(rèn)狀態(tài)下的值，還未曾改變加數(shù)的時(shí)候，這個(gè)值怎么加起來(lái)在結(jié)尾顯示呢？如下圖: