购物车页面总结
基本思路:
首先将购物车页面布局搭建出来，再将全选、商品数量的加减、相关价格的计算以及商品的总价通过jQuery实现对应的逻辑功能计算出来，最终实现相关功能。
注意事项:
1. 获取当前class名时，需使用attr获取；
2. 在做全选功能时，需要的逻辑功能是点击全选按钮下方的商品都被选中，若下方商品未被全部选中时，则全选框为被点击。检查是否被全选时需要创立一个相关功能的函数，在函数中设置两个变量分别存储相关div没有被选中时class的长度和相关div被选中时class的div的长度，通过条件判断语句判断它们此时的class名是否相等来给予全选键相关逻辑，以实现相关功能；
3. siblings() 获得匹配集合中每个元素的同胞，通过选择器进行筛选是可选的；parseInt() 函数可解析一个字符串，并返回一个整数。
4. 三元运算符格式为：条件表达式？表达式1：表达式2，条件表达式成立时输出表达式1，否则输出表达式2；
完整代码:
html部分:
<!DOCTYPE html> <html> <head> <title>小米商城</title> <meta charset="utf-8"> <link rel="shortcut icon" type="image/x-icon" href="static/images/footlogo.png" /> <link rel="stylesheet" type="text/css" href="static/css/style.css"> <link rel="stylesheet" href="static/css/cart.css"> <link rel="stylesheet" href="static/font-awesome/css/font-awesome.min.css"> <script src="static/js/jq_3.3.1_mi.js"></script> <script src="static/js/cart.js"></script> </head> <body> <!-- 购物车头部 --> <div> <div> <div> <a href=""></a> <h1>我的购物车</h1> <h6>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</h6> </div> <div> <div> <div> <a href="javascript:void(0)">我是某某某</a> <ul> <li>个人中心</li> <li>评价晒单</li> <li>我的喜欢</li> <li>小米账户</li> <li>退出登录</li> </ul> </div> <i class="fa fa-angle-down fa-1x"></i> </div> <div><a href="order.html">我的订单</a></div> </div> </div> </div> <!-- 购物车躯干部分 --> <div> <!--购物车--> <div> <div class="list list-title"> <div class="select select-all"><i class="fa fa-check" id="check-all"></i>全选</div> <div></div> <div style="font-size:14px; ">商品名称</div> <div>单价</div> <div>数量</div> <divstyle="color:#424242;">小计</div> <div>操作</div> </div> <div class="list list-item"> <div><i class="fa fa-check"></i></div> <div><img src="static/images/phone/phone1.png" alt=""></div> <div> 小米MIX 2S 全网通版 6GB内存 陶瓷标准版 64GB 白色 64GB </div> <div>3199元</div> <div> <div> <button>-</button> <input type="text" value="1"> <button>+</button> </div> </div> <div>3199元</div> <div><i class="fa fa-times"></i></div> </div> <div class="list list-item"> <div><i class="fa fa-check"></i></div> <div><img src="static/images/phone/phone1.png" alt=""></div> <div> 小米MIX 2S 全网通版 6GB内存 陶瓷标准版 64GB 白色 64GB </div> <div>3199元</div> <div> <div> <button>-</button> <input type="text" value="1"> <button>+</button> </div> </div> <div>3199元</div> <div><i class="fa fa-times"></i></div> </div> <div class="list list-item"> <div><i class="fa fa-check"></i></div> <div><img src="static/images/phone/phone1.png" alt=""></div> <div> 小米MIX 2S 全网通版 6GB内存 陶瓷标准版 64GB 白色 64GB </div> <div>3199元</div> <div> <div> <button>-</button> <input type="text" value="1"> <button>+</button> </div> </div> <div>3199元</div> <div><i class="fa fa-times"></i></div> </div> <div class="list list-total"> <div> <span><a href="">继续购物</a></span> <span>共 <span>0</span> 件商品，已选择 <span>0</span> 件</span> </div> <div> <div>合计: <span>0</span> 元</div> <a href="./close.html"><button>去结算</button></a> </div> </div> </div> <!--其他商品推荐--> <div style="margin-top: 60px;"> <p>买购物车中商品的人还买了</p> </div> <div> <div> <div></div> <div> <div style="margin-right: 12.7px;"> <img src="static/images/buy/手机1.jpg"> <h3><a href="">小米5X 4G+64GB</a></h3> <p>光学变焦双摄，拍人更美</p> <p><span style="color: #ff6700;">1499 元</span></p> </div> <div style="margin-right: 12.7px;"> <span>享八折</span> <img src="static/images/buy/手机2.jpg"> <h3><a href="">小米5X 4G+64GB</a></h3> <p>光学变焦双摄，拍人更美</p> <p><span style="color: #ff6700;">1499 元</span></p> </div> <div style="margin-right: 12.7px;"> <img src="static/images/buy/手机3.jpg"> <h3><a href="">小米5X 4G+64GB</a></h3> <p>光学变焦双摄，拍人更美</p> <p><span style="color: #ff6700;">1499 元</span></p> </div> <div> <span>享八折</span> <img src="static/images/buy/手机4.jpg"> <h3><a href="">小米5X 4G+64GB</a></h3> <p>光学变焦双摄，拍人更美</p> <p><span style="color: #ff6700;">1499 元</span></p> </div> <div style="margin-right: 12.7px; margin-top:12.7px; "> <img src="static/images/buy/手机1.jpg"> <h3><a href="">小米5X 4G+64GB</a></h3> <p>光学变焦双摄，拍人更美</p> <p><span style="color: #ff6700;">1499 元</span></p> </div> <div style="margin-right: 12.7px; margin-top:12.7px;"> <img src="static/images/buy/手机1.jpg"> <h3><a href="">小米5X 4G+64GB</a></h3> <p>光学变焦双摄，拍人更美</p> <p><span style="color: #ff6700;">1499 元</span></p> </div> <div style="margin-right: 12.7px; margin-top:12.7px;"> <img src="static/images/buy/手机1.jpg"> <h3><a href="">小米5X 4G+64GB</a></h3> <p>光学变焦双摄，拍人更美</p> <p><span style="color: #ff6700;">1499 元</span></p> </div> <div style=" margin-top:12.7px;"> <img src="static/images/buy/手机1.jpg"> <h3><a href="">小米5X 4G+64GB</a></h3> <p>光学变焦双摄，拍人更美</p> <p><span style="color: #ff6700;">1499 元</span></p> </div> </div> </div> </div> <!--——————————————————————————————————————————————————————————————— 底部——————————————————————————————————————————————————————————————————————————— --> <div> <div> <div> <div> <a href="#"><i class="fa fa-wrench"></i>预约维修服务</a><span></span> <a href="#"><i class="fa fa-rotate-right "></i>7天无理由退货</a><span></span> <a href="#"><i class="fa fa-refresh"></i>15天免费换货</a><span></span> <a href="#"><i class="fa fa-gift"></i>满150元包邮</a><span></span> <a href="#"><i class="fa fa-map-marker"></i>520余家售后网点</a> </div> <span></span> <div> <div> <dl> <dt>帮助中心</dt> <dd><a href="">账户管理</a></dd> <dd><a href="">购物指南</a></dd> <dd><a href="">订单操作</a></dd> </dl> <dl> <dt>服务支持</dt> <dd><a href="">售后政策</a></dd> <dd><a href="">自助服务</a></dd> <dd><a href="">相关下载</a></dd> </dl> <dl> <dt>线下门店</dt> <dd><a href="">小米之家</a></dd> <dd><a href="">服务网点</a></dd> <dd><a href="">授权体验店</a></dd> </dl> <dl> <dt>关于小米</dt> <dd><a href="">了解小米</a></dd> <dd><a href="">加入小米</a></dd> <dd><a href="">投资者关系</a></dd> </dl> <dl> <dt>关注我们</dt> <dd><a href="">新浪微博</a></dd> <dd><a href="">官网微博</a></dd> <dd><a href="">联系我们</a></dd> </dl> <dl> <dt>特色服务</dt> <dd><a href="">F码通道</a></dd> <dd><a href="">礼物码</a></dd> <dd><a href="">防伪查询</a></dd> </dl> <div> <p>Feir-520-1314</p> <p>周一至周日 8:00-18:00<br>(仅收市话费)</p> <button><span class="fa fa-commenting "></span> 联系客服</button> </div> </div> </div> <div></div> </div> <div> <div style="margin-right: 15px;"> <img src="static/images/footlogo.png" alt=""> </div> <div style="margin-right:50px;"> <div> <ul> <li>小米商城<span></span></li> <li>MIUI<span></span></li> <li>米家<span></span></li> <li>米聊<span></span></li> <li>多看<span></span></li> <li>游戏<span></span></li> <li>路由器<span></span></li> <li>米粉卡<span></span></li> <li>政企服务<span></span></li> <li>小米天猫店<span></span></li> <li>隐私政策<span></span></li> <li>问题反馈<span></span></li> <li>Select Region</li> </ul> </div> <div> <a href="">©mi.com</a> 京ICP证110507号 <a href="">京ICP备10046444号</a> <a href="">京公网安备11010802020134号</a> <a href="">京网文[2014]0059-0009号</a> <br> 违法和不良信息举报电话：185-0130-1238，本网站所列数据，除特殊说明，所有数据均出自我司实验室测试 </div> </div> <div> <img src="static/images/footericon1.png" alt="" style="margin-right: 10px;"> <img src="static/images/footericon2.png" alt="" style="margin-right: 10px;"> <img src="static/images/footericon3.png" alt="" style="margin-right: 10px;"> <img src="static/images/footericon4.png" alt="" style="margin-right: 10px;"> <img src="static/images/footericon5.png" alt=""> </div> <div> 探索黑科技，小米为发烧而生！ </div> </div> </div> </div> </body> </html>
css部分:
*{margin: 0px;padding: 0px;border: none;}
.clear{clear: both;}
li{list-style: none;}
a{text-decoration: none;color: #ccc;cursor:pointer;}
/*头部, 躯干宽度设定*/
.header,.trunk{width: 100%}
/*头部边框, 高度设定*/
.header{height: 100px;border-bottom: 2px solid #ff6700;}
/*躯干背景颜色和溢出设定*/
.trunk{background-color:#f5f5f5;overflow: hidden;}
/*内容总宽度, 居中设定*/
.header>.content,.trunk>.cart,.trunk>.recommend{width: 1226px;margin:0 auto;}.cart{padding-top: 38px;}
.header .content-left{float: left;}
.header .content-right{float: right;}
.header .logo,
.header .title,
.header .notice,
.header .userinfo,
.header .toOrderDetail{float: left;margin-top: 26px;}
.header .logo{width: 48px;height: 48px;margin-right:45px;background: url('../img/footlogo.png') center center;}
.header .title{font-size: 28px;line-height: 48px; margin-right: 15px;font-weight: 400;color:#424242;}
.header .notice{font-size:12px;line-height: 48px;margin-top: 32px;font-weight: 400;color: #757575;}
.header .userinfo{width: 120px;line-height: 48px;margin-top:28px;font-size: 12px;color:#757575;position: relative;}
.header .toOrderDetail{line-height: 48px;margin-top:28px;font-size:12px; color:#757575;}
.userinfo .username a,
.header .toOrderDetail a{color:#757575;}
.userinfo .username ul{position:absolute;width: 120px;padding:7px 0;display:none;background-color: #fff;margin-left: -10px;text-align: center;box-shadow:0 2px 10px rgba(0,0,0,0.15)}
.userinfo .username li{height: 30px;width: 100%;color:#757575;line-height: 30px;}
.userinfo :hover ul{display:block;}
.userinfo .username li:hover{color:#ff6700;background-color:#f5f5f5;}
.userinfo i{position:absolute;top:20px;right:20px;}
.userinfo :hover a,
.userinfo :hover i{color:#ff6700;}
.cart>.list{background-color: #fff;overflow: hidden;}
.list div{float: left;}
.cart .select{width: 110px;text-align: center;}
.cart .select i{font-size:13px; display:inline-block;height: 15px;width:15px;line-height: 15px;background-color:#fff;color:rgba(0,0,0,0);border:1px solid #e0e0e0;margin:0 15px 0 24px;cursor: pointer;}
/*.cart .select i:hover{color:#757575}*/
.cart .select .checked{color:#fff;background-color: #ff6700;border:1px solid #ff6700;}
.cart .good-img{width: 120px;cursor: pointer;}
.cart .good-img img{width: 60px;height: 60px;margin-top: 15px;}
.cart .good-name{width: 380px; text-overflow: ellipsis; white-space: nowrap; overflow: hidden;cursor: pointer;font-size: 17px;color: #424242;}
.cart .good-price{width:75px;padding-right: 84px;text-align: right;}
.cart .good-num{width: 150px;text-align: center;}
.good-num .num-input{padding:0;margin-top:24px;width: 150px;height: 40px;border:1px solid #e0e0e0;padding-top: 1px;}
.num-input button{width: 38px;height:38px;text-align: center;line-height: 38px;color:#757575;background-color:#fff;font-size: 20px;}
.num-input button:hover{background-color: #e0e0e0}
.num-input .minus{float: left;}
.num-input .plus{float: right;}
.num-input .num-value{float: left; width: 72px;height: 38px;text-align: center;font-size: 16px;}
.cart .good-total-price{width: 120px;padding-right: 81px;text-align: right;color: #FF6A00;}
.cart .operation{width: 80px;padding-right: 26px;text-align: center;}
.cart .operation i{display:inline-block;width: 20px;height: 20px;border-radius: 10px;color:#757575;line-height: 20px;font-size: 12px; }
.cart .operation i:hover{background-color: #F07474;color:#fff;cursor: pointer;}
.list-title div{height: 70px;line-height: 70px;font-size: 14px;}
.list-item div{height: 86px;padding:15px 0;line-height: 86px;border-top:1px solid #e0e0e0;}
.list-total{margin: 20px 0px;height: 50px;line-height: 50px;font-size:14px;}
.list-total .list-total-left{float: left;}
.list-total .list-total-right{float: right;}
.list-total-left .notice{margin-left: 32px;font-size: 12px;background-color:#fff;color: #424242;}
.list-total-left .notice a{color: #424242;font-size: 14px;}
.list-total-left .statistics{margin-left: 16px;padding-left: 16px;font-size: 12px;border-left: 1px solid #eee;color: #424242;font-size: 14px;}
.statistics span{color:#FF6A00;}
.list-total-right .total-price{float: left;font-size: 14px;color: #ff6700}
.list-total-right .total-price .sum-price{font-size: 24px;}
.list-total-right .submit-cart{float: right;height:50px;width: 200px;background-color:#ff6700;color:#fff;font-size: 18px;margin-left: 60px;}
/*商品推荐*/
.recommend{position: relative;border-top:1px solid #ccc;height: 40px;}
.recommend p{font-size: 31px;color: #757575;background: #F5F5F5;width:460px;height: 40px;position: absolute;top: -20px; left:380px;text-align: center;}
.content-bottom{background:#F5F5F5;padding-bottom:60px; }
.content-bottom1{width: 1226px; margin:0px auto; }
.content-bottom1_shop{height: 614px;width: 1226px;margin-top: 10px;}
.content-bottom1_shop1{height: 614px;width:234px;background: url(../img/buy/手机AD.jpg);margin-right:10px;float:left;}
.content-bottom1_shop2{height: 614px;width:982px;float:left;}
.content-bottom1_1 div{height:300px;width: 235px;}
.content-bottom1_a{margin-right:12.7px;background:#ccc;float: left;}
.content-bottom1_b{margin-right:12.7px;background:#ccc;float: left;}
.content-bottom1_c{margin-right:12.7px;background:#ccc;float: left;}
.content-bottom1_d{background:#ccc;float: left;}
.content-bottom1_2 div{height:300px;width: 235px;margin-top: 14px;}
.content-bottom1_e{margin-right:12.7px;background:#ccc;float: left;}
.content-bottom1_f{margin-right:12.7px;background:#ccc;float: left;}
.content-bottom1_g