Vue購物車案例
阿新 • • 發佈：2021-09-19
世界不會因為你的疲憊,而停下它的腳步<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>購物車</title> <style type="text/css"> .container {} .container .cart { width: 300px; margin: auto; } .container .title { background-color: lightblue; height: 40px; line-height: 40px; text-align: center; /*color: #fff;*/ } .container .total { background-color: #FFCE46; height: 50px; line-height: 50px; text-align: right; } .container .total button { margin: 0 10px; background-color: #DC4C40; height: 35px; width: 80px; border: 0; } .container .total span { color: red; font-weight: bold; } .container .item { height: 55px; line-height: 55px; position: relative; border-top: 1px solid #ADD8E6; } .container .item img { width: 45px; height: 45px; margin: 5px; } .container .item .name { position: absolute; width: 90px; top: 0; left: 55px; font-size: 16px; } .container .item .change { width: 100px; position: absolute; top: 0; right: 50px; } .container .item .change a { font-size: 20px; width: 30px; text-decoration: none; background-color: lightgray; vertical-align: middle; } .container .item .change .num { width: 40px; height: 25px; } .container .item .del { position: absolute; top: 0; right: 0px; width: 40px; text-align: center; font-size: 40px; cursor: pointer; color: red; } .container .item .del:hover { background-color: orange; } </style> </head> <body> <div id="app"> <div class="container"> <my-cart></my-cart> </div> </div> <script src="../js/vue.js"></script> <script> var CartTitle = { props: ['uname'], template: ` <div class='title'>{{uname}}的商品</div> ` } var CartList = { props: ['list'], template: ` <div> <div :key='item.id' v-for='item in list' class="item"> <img :src="item.img"/> <div class="name">{{item.name}}</div> <div class="change"> <a href="" @click.prevent='sub(item.id)'>－</a> <input type="text" class="num" :value='item.num' @blur='changeNum(item.id, $event)'/> <a href="" @click.prevent='add(item.id)'>＋</a> </div> <div class="del" @click='del(item.id)'>×</div> </div> </div> `, methods: { changeNum: function (id, event) { this.$emit('change-num', { id: id, type: 'change', num: event.target.value }); }, sub: function (id) { this.$emit('change-num', { id: id, type: 'sub' }); }, add: function (id) { this.$emit('change-num', { id: id, type: 'add' }); }, del: function (id) { // 把id傳遞給父元件 this.$emit('cart-del', id); } } } var CartTotal = { props: ['list'], template: ` <div class='total'> <span>總價:{{total}}</span> <button>結算</button> </div> `, computed: { total: function () { //計算商品的總價 var t = 0; this.list.forEach(element => { t += element.price * element.num; }); return t; } } } Vue.component('my-cart', { data: function () { return { uname: '張三', list: [{ id: 1, name: 'TCL彩電', price: 1000, num: 1, img: '../img/a.jpg' }, { id: 2, name: '機頂盒', price: 1000, num: 1, img: '../img/b.jpg' }, { id: 3, name: '海爾冰箱', price: 1000, num: 1, img: '../img/c.jpg' }, { id: 4, name: '小米手機', price: 1000, num: 1, img: '../img/d.jpg' }, { id: 5, name: 'PPTV電視', price: 1000, num: 2, img: '../img/e.jpg' }] } }, template: ` <div class='cart'> <cart-title :uname='uname'></cart-title> <cart-list :list='list'@change-num='changeNum($event)' @cart-del='delCart($event)'></cart-list> <cart-total :list='list'></cart-total> </div> `, components: { 'cart-title': CartTitle, 'cart-list': CartList, 'cart-total': CartTotal }, methods: { changeNum: function (val) { // 分為三種情況：輸入域變更、加號變更、減號變更 if (val.type == 'change') { // 根據子元件傳遞過來的資料，跟新list中對應的資料 this.list.some(item => { if (item.id == val.id) { item.num = val.num; // 終止遍歷 return true; } }); } else if (val.type == 'sub') { // 減一操作 this.list.some(item => { if (item.id == val.id) { item.num -= 1; // 終止遍歷 return true; } }); } else if (val.type == 'add') { // 加一操作 this.list.some(item => { if (item.id == val.id) { item.num += 1; // 終止遍歷 return true; } }); } }, delCart: function (id) { // 根據id刪除list中對應的資料 // 1、找到id所對應資料的索引 var index = this.list.findIndex(item => { return item.id == id; }); // 2、根據索引刪除對應資料 this.list.splice(index, 1); } } }); var vm = new Vue({ el: '#app', data: { } }); </script> </body> </html>