Example
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</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> <div> <my-cart></my-cart> </div> </div> <script type="text/javascript" src="http://www.likecs.com/js/vue.js"></script> <script type="text/javascript"> var CartTitle = { props: ['uname'], template: ` <div>{{ uname }}的商品</div> ` } var CartList = { props: ['list'], template: ` <div> <div :key='item.id' v-for='item in list'> <img :src="item.img" /> <div>{{ item.name }}</div> <div> <a href="" @click.prevent="sub(item.id)">－</a> <input type="text" :value='item.num' @blur='changeNum(item.id,$event)' /> <a href="" @click.prevent="add(item.id)">＋</a> </div> <div @click="del(item.id)">×</div> </div> </div> `, methods: { changeNum: function (id, event) { this.$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) { // 把获取到的id传递给父组件 this.$emit('cart-del', id) } } } var CartTotal = { props: ['list'], template: ` <div> <span>总价：{{ total }}</span> <button>结算</button> </div> `, computed: { total: function () { // 计算商品的总价 var t = 0; this.list.forEach(item => { t += item.price * item.num }) return t } } } Vue.component('my-cart', { data: function () { return { uname: '张三', list: [{ id: 1, name: 'TCL彩电', price: 1000, num: 1, img: 'img/a.jpg' }, { id: 2, name: '机顶盒', price: 1000, num: 1, img: 'img/b.jpg' }, { id: 3, name: '海尔冰箱', price: 1000, num: 1, img: 'img/c.jpg' }, { id: 4, name: '小米手机', price: 1000, num: 1, img: 'img/d.jpg' }, { id: 5, name: 'PPTV电视', price: 1000, num: 2, img: 'img/e.jpg' }] } }, template: ` <div> <cart-title :uname='uname'></cart-title> <cart-list :list='list' @change-num='changeNum($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) { // 分为三种情况: 输入域变更,加号变更,减号变更 if (val.type == 'change') { // 根据子组件传递过来的数据,跟新list中对应数据 this.list.some(item => { if (item.id == val.id) { item.num = val.num // 终止遍历 return true } }) } else if (val.type == 'sub') { // 减一操作 this.list.some(item => { if (item.id == val.id) { item.num -= 1 // 终止遍历 return true } }) } else if (val.type = 'add') { // 加一操作 this.list.some(item => { if (item.id == val.id) { item.num += 1 // 终止遍历 return true } }) } }, delCart: function (id) { // 根据id删除list中对应的数据 // 1. 找到id对应数据的索引 var index = this.list.findIndex(item => { return item.id == id }) // 2. 根据索引删除对应数据 this.list.splice(index, 1) } } }) ; var vm = new Vue({ el: '#app', data: {} }); </script> </body> </html> fetch请求组件fetch