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exer06.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="lib/vue-2.4.0.js"></script>
</head>
<body>
<div id="app">
<input type="text" v-model="n1">
<select name="" id="" v-model="opt">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<input type="text" v-model="n2">
<input type="button" @click="calc" value="=">
<input type="text" v-model="result">
</div>
<script>
var vm = new Vue ({
el:'#app',
data:{
n1:0,
n2:0,
result:0,
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;
// }
var statement = 'parseInt(this.n1)'+this.opt+'parseInt(this.n2)'
this.result=eval(statement)
}
}
})
</script>
</body>
</html>