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Vue.js03:v-model實現簡易計算器

pat rip utf-8 content scale http () bug switch

v-model用於數據的雙向綁定。bug不少,湊合看吧,主要是練習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 雙向綁定數據 --> <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"> <!-- @ 用於事件綁定 --> <
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>

Vue.js03:v-model實現簡易計算器