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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>简易计算器</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>+</option>
<option>-</option>
<option>*</option>
<option>/</option>
</select>
<input type="text" v-model="n2">
<input type="button" value="=" @click="calculate">
<input type="text" v-model="result">
</div>
</body>
<script>
var vm = new Vue({
el: '#app',
data: {
n1: '',
n2: '',
result: '',
opt: '+'
},
methods: {
calculate() {
var calcStr = 'parseInt(this.n1)' + this.opt + 'parseInt(this.n2)';
this.result = eval(calcStr);
}
}
});
</script>
</html>
