时间:1.6个小时左右
代码:50行左右
博客:2
学习内容：今天写了一个购物车样式
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style type="text/css"> .container { } .container .cart { 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; 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 { 45px; height: 45px; margin: 5px; } .container .item .name { position: absolute; 90px; top: 0;left: 55px; font-size: 16px; } .container .item .change { 100px; position: absolute; top: 0; right: 50px; } .container .item .change a { font-size: 20px; 30px; text-decoration:none; background-color: lightgray; vertical-align: middle; } .container .item .change .num { 40px; height: 25px; } .container .item .del { position: absolute; top: 0; right: 0px; 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 type="text/javascript" src="js/vue.js"></script> <script type="text/javascript"> 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传递给父组件 this.$emit('cart-del', id); } } } var CartTotal = { props: ['list'], template: ` <div class="total"> <span>总价：{{total}}</span> <button>结算</button> </div> `, computed: { total: function() { // 计算商品的总价 var t = 0; this.list.forEach(item => { t += item.price * item.num; }); return t; } } } Vue.component('my-cart',{ data: function() { return { uname: '张三', list: [{ id: 1, name: 'TCL彩电', price: 1000, num: 1, img: 'img/a.jpg' },{ id: 2, name: '机顶盒', price: 1000, num: 1, img: 'img/b.jpg' },{ id: 3, name: '海尔冰箱', price: 1000, num: 1, img: 'img/c.jpg' },{ id: 4, name: '小米手机', price: 1000, num: 1, img: 'img/d.jpg' },{ id: 5, name: 'PPTV电视', price: 1000, num: 2, img: 'img/e.jpg' }] } }, template: ` <div class='cart'> <cart-title :uname='uname'></cart-title> <cart-list :list='list' @change-num='changeNum($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中对应的数据 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所对应数据的索引 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>
