<!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>Vue</title>
<script src="../lib/vue-2.4.0.js"></script>
</head>
<body>
<div id="app" >
<!-- 数字一 -->
<input type="text" v-model='n1' placeholder="0">
<!-- 加减乘除 -->
<select v-model='opt'>
<option value="+"> + </option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<!-- 数字2 -->
<input type="text" v-model='n2' placeholder="0">
<!-- 等号 -->
<input type="button" value='=' >
<!-- 结果 -->
<input type="text" v-model='result' placeholder="0">
<!-- 确定按钮 -->
<input type="button" value='结果' @click='calc'>
<!-- 归零 -->
<input type="button" value='归零' @click='zero'>
</div>
<script>
var vm = new Vue({
el: '#app', //表示当前new的这个实例要控制页面上的那个区域
data: { //data属性存放着 el 中要用到的数据
n1: '',
n2:'',
result:'',
opt: '+'
},
methods:{
calc(){
// switch(this.opt){
// case '+':
// this.result = parseInt(this.n1) + parseInt(this.n2)
// break;
// case '-':
// this.result = parseInt(this.n1) - parseInt(this.n2)
// break;
// case '*':
// this.result = parseInt(this.n1) * parseInt(this.n2)
// break;
// case '/':
// this.result = parseInt(this.n1) / parseInt(this.n2)
// break;
// }
// 简写
var codeStr = 'parseInt(this.n1) '+ this.opt +' parseInt(this.n2)'
this.result = eval(codeStr)
},
zero(){
this.n1 = '',
this.n2 = '',
this.result = '',
this.opt = '+'
}
}
})
</script>
</body>
</html>
关于计算器相关技术文章请点击专题： javascript计算器功能汇总
