小米商城购物车案例实现

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所属分类:Web前端
摘要

 以下是代码部分: 


首先,给大家看下效果图:

小米商城购物车案例实现

 

 该案例包含的功能有:可以对商品价格进行计算,用户可以对商品数量进行增加和勾选,底部有显示用户勾选商品的件数,还有商品总价的结果,此外,用户还有对商品进行移除的功能。

以下是代码部分:

html+css代码:

<!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>Document</title> </head> <style>     * {         padding: 0;         margin: 0;     }     .fl{         float: left;     }     .fr{         float: right;     }     header {         height: 30px;         background-color: rgb(61, 61, 61);     }      header>ul {         margin-right: 100px;     }      li {         list-style: none;         float: right;         line-height: 30px;         padding: 0 10px;         box-sizing: border-box;     }      header a {         text-decoration: none;         color: #ccc;         font-size: 14px;     }      header li:hover {         background-color: rgb(255, 103, 0);     }     body{         background-color: rgb(245,245,245);     }     .banner {         height: 102px;         width: 100%;         background-color: #fff;         border-bottom: 2px solid rgb(255, 103, 0);     }      .banner_left {         width: 50%;         height: 102px;         float: left;     }      .banner_left img {         width: 48px;         height: 48px;         margin-left: 100px;         float: left;         margin-top: 30px;     }      .banner_left>:nth-child(2) {         font-size: 28px;         font-weight: 400;         line-height: 48px;         margin-left: 40px;         float: left;         margin-top: 30px;     }      .banner_left>:nth-child(3) {         font-size: 14px;         margin-left: 10px;         margin-top: 50px;         float: left;         color: #999999;     }     .carList table{         margin: 0 auto;         background-color: #fff;         margin-top: 20px;         border: none;     }     .carList table th,.carList table td{         border-collapse: collapse;     }     .carList table tbody img{         width: 80px;         height: 80px;     }     .carList table td{         border: 0;     }     .resultPrice{         width: 840px;         height: 50px;         margin: 0 auto;         background-color: #fff;         margin-top: 20px;     } </style>  <body>     <header>         <ul>             <li><a href="javascript:;">我的订单</a></li>             <li><a href="javascript:;">我的收藏</a></li>             <li><a href="javascript:;">购物车</a></li>             <li><a href="javascript:;">欢迎admin</a></li>         </ul>     </header>     <section>         <div class="banner">             <div class="banner_left">                 <img src="./images/logo-mi2.png" alt="">                 <span>我的购物车</span>                 <span>温馨提示:产品是否购买成功,以最终下单为准哦,请尽快结算</span>             </div>             <div class="banner_right"></div>         </div>         <div class="carList">             <table border="0">                 <thead>                     <th><input type="checkbox" id="selectAll"> 全选</th>                     <th width="150px">商品名称</th>                     <th width="100px">商品图片</th>                     <th width="100px">单价</th>                     <th >数量</th>                     <th width="100px">小计</th>                     <th width="100px">操作</th>                 </thead>                 <tbody>                     <tr>                         <td align="center"><input type="checkbox" class="check"></td>                         <td align="center">短袖</td>                         <td align="center"><img src="https://gw.alicdn.com/bao/uploaded/i2/2207254512241/O1CN012mppDy1SQQHDRIWRC_!!0-item_pic.jpg_300x300q90.jpg_.webp" alt=""></td>                         <td align="center"><span class="price">39</span></td>                         <td>                             <button style="width: 20px;" class="deBtn">-</button>                             <input type="number" value="1" class="itemCount">                             <button style="width: 20px;" class="inBtn">+</button>                         </td>                         <td align="center"><span class="totalPrice">39.00</span></td>                         <td align="center"><button class="rmItem">移除商品</button></td>                     </tr>                     <tr>                         <td align="center"><input type="checkbox" class="check"></td>                         <td align="center">包包</td>                         <td align="center"><img src="https://gw.alicdn.com/bao/uploaded/i3/3937219703/O1CN01YDs4Ui2LY1nQa4Gi2_!!3937219703-0-C2M.jpg_300x300q90.jpg_.webp" alt=""></td>                         <td align="center"><span class="price">13.9</span></td>                         <td>                             <button style="width: 20px;" class="deBtn">-</button>                             <input type="number" value="1" class="itemCount">                             <button style="width: 20px;" class="inBtn">+</button>                         </td>                         <td align="center"><span class="totalPrice">13.90</span></td>                         <td align="center"><button class="rmItem">移除商品</button></td>                     </tr>                     <tr>                         <td align="center"><input type="checkbox" class="check"></td>                         <td align="center">Redmi Note 11Pro</td>                         <td align="center"><img src="https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/6d0a3e7acc3e91e2cfd83dbbe1d1c029.jpg?thumb=1&w=225&h=225&f=webp&q=90" alt=""></td>                         <td align="center"><span class="price">1799</span></td>                         <td>                             <button style="width: 20px;" class="deBtn">-</button>                             <input type="number" value="1" class="itemCount">                             <button style="width: 20px;" class="inBtn">+</button>                         </td>                         <td align="center"><span class="totalPrice">1799.00</span></td>                         <td align="center"><button class="rmItem">移除商品</button></td>                     </tr>                   </tbody>             </table>         </div>         <div class="resultPrice">             <div class="left fl">                 <span class="fl" style="width: 100px;line-height: 50px;text-align: center;color: #999999;">继续购物</span>                 <div class="line fl" style="width: 20px;line-height: 50px;text-align: center;color: #999999;">|</div>                 <div class="fl" style="width: 200px;line-height: 50px;text-align: center;color: #999999;"><span style="color: rgb(255,103,0);" class="itemAll">0</span>件商品,已选择<span style="color: rgb(255,103,0);" class="selectCnt">0</span></div>             </div>             <div class="right fr" style="color: rgb(255, 103, 0); line-height: 50px;font-size: 14px;">                 合计:<span class="prices" style="font-size: 20px;">0.00</span><button style="border: none;background-color: rgb(255, 103, 0);width: 130px;height: 50px;color: #fff;">去结算</button>             </div>         </div>     </section> </body> <script src="./car.js"></script> </html>

 

 

js代码部分:

var deBtns=document.querySelectorAll('.deBtn') var inBtns=document.querySelectorAll('.inBtn') var itemCounts=document.querySelectorAll('.itemCount') var price=document.querySelectorAll('.price') var totalPrice=document.querySelectorAll('.totalPrice') var checks=document.querySelectorAll('.check') var selectAll=document.querySelector('#selectAll') var itemAll=document.querySelector('.itemAll') var selectCnt=document.querySelector('.selectCnt') var rmItems=document.querySelectorAll('.rmItem') var prices=document.querySelector('.prices') var sum=0 for(let i=0;i<deBtns.length;i++){     var cnt=0     deBtns[i].onclick=function(){         if(itemCounts[i].value<=1){             alert('商品数量不能小于1!')         }else{             itemCounts[i].value--             subtotal(i)             prices.innerHTML=totalUnitDe(i)         }     }     inBtns[i].onclick=function(){         itemCounts[i].value++         subtotal(i)         prices.innerHTML=totalUnitAdd(i)              }     checks[i].onclick=function(){         if(isAllSelect()){             selectAll.checked=true         }else{             selectAll.checked=false         }         if(this.checked){             cnt++             prices.innerHTML=total(i)         }else{             cnt--             prices.innerHTML=totalSUB(i)         }         selectCnt.innerHTML=cnt     }     selectAll.onclick=function(){         if(selectAll.checked){             for(var i=0;i<checks.length;i++){                 checks[i].checked=true              }             selectCnt.innerHTML=checks.length             prices.innerHTML=allPrice()         }else{             for(var i=0;i<checks.length;i++){                 checks[i].checked=false             }             selectCnt.innerHTML=0             prices.innerHTML=0         }     }     rmItems[i].onclick=function(){         rmItem(i)     }     itemAll.innerHTML=checks.length } function subtotal(index){     var sum=0     sum=itemCounts[index].value*price[index].innerHTML     totalPrice[index].innerHTML=sum.toFixed(2) } function total(index){    sum+=Number(totalPrice[index].innerHTML)     return sum.toFixed(2) } function totalSUB(index){     sum-=Number(totalPrice[index].innerHTML)     return sum.toFixed(2) } function isAllSelect(){     var cnt=0     for(var i=0;i<checks.length;i++){         if(checks[i].checked){             cnt++         }     }     return cnt==checks.length } function rmItem(index){     rmItems[index].parentElement.parentElement.remove()     if(checks[index].checked){         sum-=itemCounts[index].value*price[index].innerHTML     }     prices.innerHTML=sum.toFixed(2) }  function allPrice(){     sum=0     for(var i=0;i<checks.length;i++){         sum+=itemCounts[i].value*price[i].innerHTML     }     return sum }  function totalUnitAdd(index){     sum+=Number(price[index].innerHTML)     return sum.toFixed(2) } function totalUnitDe(index){     sum-=Number(price[index].innerHTML)     return sum.toFixed(2) }