<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Hello Vue</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
/* 刷新的时候不显示 */
[v-cloak]{
display: none;
}
select{
margin: 0 20px;
width: 50px;
}
</style>
</head>
<body>
<div id="main">
<h1>计算器</h1>
<input type="text" placeholder="请输入x" v-model="x"/>
<select v-model="opt">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">×</option>
<option value="/">÷</option>
</select>
<input type="text" placeholder="请输入y" v-model="y"/>
<input type="button" value="=" @click="count"/>
<input type="text" placeholder="z" v-model="z"/>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
var vm = new Vue({
// 要用哪一个div 即V层
el : '#main',
// 数据 即M层
data : {
x:"",
y:"",
z:"",
opt:"+"
},
// 初始化页面函数
mounted(){
},
// 方法 函数
methods : {
count:function(){
switch(this.opt){
case'+':
this.z = parseInt(this.x)+parseInt(this.y)
break
case'-':
this.z = parseInt(this.x)-parseInt(this.y)
break
case'*':
this.z = parseInt(this.x)*parseInt(this.y)
break
case'/':
this.z = parseInt(this.x)/parseInt(this.y)
break
}
}
},
})
</script>
</body>
</html>
51cto:http://edu.51cto.com//center/course/lesson/index?id=290716