通过用v-model来实现简易计算器
【代码实现】
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Vue学习</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
<input type="text" v-model="n1" />
<select 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" value="=" @click="cal"/>
<input type="text" v-model="result" />
</div>