Vue.js03:v-model实现简易计算器

vue

v-model用于数据的双向绑定。bug不少,凑合看吧,主要是练习v-model。

<!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>Document</title>

<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>

</head>

<body>

<div id="app">

<!-- v-model 双向绑定数据 -->

<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">

<!-- @ 用于事件绑定 -->

<input type="button" value="=" @click="cal">

<input type="text" v-model="result">

</div>

</body>

<script>

let vm = new Vue({

el: '#app',

data: {

n1: 0,

n2: 0,

result: 0,

opt: '+'

},

methods: {

cal(){

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

}

}

}

})

</script>

</html>

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