vue_10 利用v-model实现计算器(小案例)

主要是利用v-model的数据双向绑定

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <script src="util/vue-2.4.0.js"></script>
</head>
<body>
<div id="test">
    <input type="text" v-model="n1"/>
    <select name="jisuanqi" id="" v-model="rule">
        <option value="+">+</option>
        <option value="-">-</option>
        <option value="*">*</option>
        <option value="/">/</option>
    </select>
    <input type="text" v-model="n2"/>
    <input type="button" value="=" @click="res"/>
    <input type="text" v-model="n3"/>

</div>
<script>
    var vm1 = new Vue({
        el:"#test",
        data:{
            n1:"",
            n2:"",
            n3:"",
            rule:"+"
        },
        methods:{
            res: function () {
                console.log(this.rule);
                if (this.rule == "+"){
                    this.n3 = Number(this.n1) + Number(this.n2);
                }
                if (this.rule == "-"){
                    this.n3 = Number(this.n1) - Number(this.n2);

                }
                if (this.rule == "*"){
                    this.n3 = Number(this.n1) * Number(this.n2);

                }
                if (this.rule == "/"){
                    this.n3 = Number(this.n1) / Number(this.n2);

                }
            }
        }
    })
</script>
</body>
</html>