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原生购物车Vue改写
Blackeye
Original
480 people have browsed it

LNjN3q.gif

  1. <!DOCTYPE html>
  2. <html lang="en">
  3.   <head>
  4.     <meta charset="UTF-8" />
  5.     <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  6.     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  7.     <title>购物车_vue</title>
  8.     <script src="https://unpkg.com/vue@next"></script>
  10.     <style>
  11.       *{
  12.         margin: 0;
  13.         padding: 0;
  14.         box-sizing: border-box;
  15.       }
  16.       .box {
  17.         width: 35em;
  18.         height: 2em;
  19.         margin: auto;
  20.       }
  21.       .list > li {
  22.         height: 1.6em;
  23.         background-color: #efefef;
  24.         display: grid;
  25.         grid-template-columns: repeat(5, 6em);
  26.         gap: 1em;
  27.         place-items: center left;
  28.         border-bottom: 1px solid #ccc;
  29.       }
  30.       .list > li:first-of-type {
  31.         background-color: rgb(33, 91, 138);
  32.         color: white;
  33.       }
  34.       .list > li:hover:not(:first-of-type) {
  35.         cursor: pointer;
  36.         background-color: rgb(85, 125, 212);
  37.       }
  38.       .list > li input[type="number"] {
  39.         width: 3em;
  40.         border: none;
  41.         outline: none;
  42.         text-align: center;
  43.         font-size: 1em;
  44.         background-color: transparent;
  45.       }
  46.       .list > li:nth-last-of-type(2) span.total-num,
  47.       .list > li:nth-last-of-type(2) span.total-amount {
  48.         grid-column: span 2;
  49.         place-self: center left;
  50.         color: rgb(85, 125, 212);
  51.       }
  52.       .list > li:last-of-type span{
  53.         grid-column: span 2;
  54.         place-self: center right;
  55.         color: red;
  56.       }
  57.     </style>
  58.   </head>
  59.   <body>
  60.     <!-- vue挂载点 -->
  61.     <div class="app">
  62.       <div class="box" @change="updata($event)">
  64.         <div class="select-all" @click="selectAll=!selectAll">
  65.           <input type="checkbox" class="check-all" :checked="selectAll"/>
  66.           <label for="check-all">全选</label>
  67.         </div>
  68.         <ul class="list" ref="list">
  69.           <!-- 表单头 -->
  70.           <li>
  71.             <span v-for="(item, index) of shopCartList" :key="index"
  72.               >{{item}}</span
  73.             >
  74.           </li>
  75.           <!-- 商品list -->
  76.           <Item-list name="手机" price="100"></Item-list>
  77.           <Item-list name="电脑" price="200"></Item-list>
  78.           <Item-list name="相机" price="300"></Item-list>
  79.           <Item-list name="冰箱" price="400"></Item-list>
  80.           <li>
  81.             <span>总计</span>
  82.             <span class="total-num">数量: {{numbers}}</span>
  83.             <span class="total-amount">总金额: {{totalPay}}</span>
  84.           </li>
  85.           <li>
  86.             <span>折扣金额: {{disCount}}</span>
  87.             <span>应付金额: {{disPay}}</span>
  88.           </li>
  89.         </ul>
  90.       </div>
  93.     </div>
  95.     <!-- 商品list模板 -->
  96.     <template id="itemLists">
  97.       <li>
  98.         <input type="checkbox"/> 
  99.         <span class="content">{{name}}</span>
  100.         <input type="number" v-model="num" min="1"/>
  101.         <span class="price">{{price}}</span>
  102.         <span class="amount">{{payAmount}}</span>
  103.       </li>
  104.     </template>
  105.   </body>
  106.   <script>
  107.     // vue实例
  108.     const app = Vue.createApp({
  109.       data() {
  110.         return {
  111.           shopCartList: ["选择", "品名", "数量", "单价", "金额"],
  112.           numbers:0,
  113.           totalPay:0,
  114.           disCount:0,
  115.           disPay:0,
  116.           selectAll:true
  117.         };
  118.       },
  119.       methods:{
  120.         updata(el){
  121.           if(this.selectAll && ( el===0 || (el.target.className==="check-all") )){
  122.             [...document.querySelectorAll(".list>li input[type='checkbox']")].map(item=>item.checked=true);
  123.           }else if(el===0 ||el.target.className==="check-all"){
  124.             [...document.querySelectorAll(".list>li input[type='checkbox']")].map(item=>item.checked=false);
  125.           }
  126.           const item_ck = [...document.querySelectorAll(".list>li input[type='checkbox']")];
  127.           if(item_ck.every(item=>item.checked)){
  128.             this.selectAll=true;
  129.           }else{
  130.             this.selectAll=false;
  131.           }
  132.           const item_price = [...document.querySelectorAll(".price")];
  133.           const item_num = [...document.querySelectorAll(".list>li input[type='number']")];
  135.           // item_ck.forEach(item=>console.log(item.checked));
  137.           let temp_num_list = item_num.map((item,index)=>{
  138.             if(item_ck[index].checked){
  139.               return parseInt(item.value);
  140.             }else{
  141.               return 0;
  142.             }
  143.           });
  144.           this.numbers = temp_num_list.reduce((res,index)=>res+index);
  145.           this.totalPay = temp_num_list.map((item,index)=>item*item_price[index].textContent).reduce((acc,index)=>acc+index);
  146.         }
  147.       },
  148.       watch:{
  149.         totalPay(current,origin){
  150.           switch(true){
  151.             case current>=600:
  152.               this.disCount=100;
  153.               break;
  154.             default:
  155.               this.disCount = 0;
  156.           }
  157.           this.disPay = current-this.disCount;
  158.         }
  159.       },   
  160.       mounted(){
  161.         this.$nextTick(function(){
  162.           this.updata(0);
  163.         })
  164.       },
  165.     });
  167.     // 注册组件
  168.     app.component("ItemList", {
  169.       template: "#itemLists",
  170.       props: ["name", "price"],
  171.       data(){
  172.         return {
  173.             num:1,
  174.         };
  175.       },
  176.       computed:{
  177.         payAmount(){
  178.             return this.num*this.price;
  179.         }
  180.       }
  181.     });
  182.     // 挂载实例
  183.     app.mount(".app");
  184.   </script>
  185. </html>
Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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