Correction status:qualified
Teacher's comments:
今天我们来完成购物车选中分类菜单特效。
下面是购物车商品参数的html代码:
<div class="top">请选择信息后加入购物车</div> <div class="main"> <p class="item" name="version"> <b class="notice">版本</b> <span>ONE A2001</span> <span>ONE A0001</span> <span>ONE A1001</span> </p> <p class="item" name="color"> <b class="notice">机身颜色</b> <span>白色</span> <span>黑色</span> <span>金色</span> </p> <p class="item" name="type"> <b class="notice">套餐类型</b> <span>标配</span> <span>套餐一</span> <span>套餐二</span> </p> <p class="item" name="ram"> <b class="notice">运行内存</b> <span>2GB</span> <span>3GB</span> <span>4GB</span> </p> <p class="item" name="rom"> <b class="notice">机身内存</b> <span>16GB</span> <span>32GB</span> <span>64GB</span> </p> <p class="item" name="location"> <b class="notice">产地</b> <span>中国大陆</span> <span>港澳台</span> </p> <p class="item" name="price"> <b class="notice">价格</b> <span>999元抢购</span> </p> <p class="item1" name="num"> <b class="notice">数量</b> <input type="number" value="1" style="width:40px;height:26px;"> </p> <p style="margin-top:30px;margin-left:95px;"> <button class="bu1" id='sub'>加入购物车</button> </p> </div>
一、实现目标
实现点击商品属性,选中商品参数,每种参数只能选择一个;
实现点击加入购物车按钮,弹出提示窗口,判断参数是否被选中,判断数量不为0;
二、实现过程
通过hasClass()判断span中是否含有select,也就是是否被选中。
$('span').click(function(){ if($(this).hasClass('select')){ //hasClass判断是否含有select $(this).removeClass('select');//如果有,就移除select }else{ $(this).addClass('select').siblings('span').removeClass('select'); //如果没有就添加select,并在同级元素中选择时,清除同级元素的select } });
2.,创建数组,通过each()遍历获取元素,判断select的数量。
$('#sub').click(function(){ let form = {};//创建空数组,用来存放数据 let flag = true;//用来判断是否加入购物车 $('.item').each(function(){ if($(this).children('span.select').length != 1){ alert($(this).find('.notice').html() + '不能为空'); flag = false; }else { let key = $(this).attr('name'); let value = $(this).children('span.select').html(); form[key] = value; } }) if($('.item1 input').val() <= 0){ alert('数量不能少于1'); flag = false; }else{ form['num'] = $('.item1 input').val() console.log(form) }; if(flag){ alert('可以放入购物车了'); } });
3.完整代码
<!DOCTYPE HTML> <html> <head> <title>点击商品选中效果</title> <meta charset="utf-8"/> <link rel="icon" type="image/x-icon" href="images/2.png"> <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script> <style type="text/css"> * {margin: 0px auto;padding: 0px;} .top {width: 402px;height: 35px; line-height: 35px;text-align:center; margin-top: 50px; background: #C40000;color:#fff; } .main {width: 400px;height: 400px;border: 1px solid #C40000;} p {width: 400px;height: 26px;margin-top:10px;} b {width: 90px;height: 26px; line-height: 26px;text-align: center; font-size: 12px;color:#838383; border: 1px solid #ccc; float: left;margin-left: 5px;} span {width: 90px;height: 26px;line-height: 26px; text-align: center;font-size: 12px; color:#838383;border: 1px solid #ccc; display: block;float: left;margin-left: 5px;} span:hover {cursor: pointer;} button {width: 120px;height: 35px;background: #C40000;color: white;border: 0px;} button:hover {cursor: pointer;} .notice{ border:0px; } .select { border: 2px solid #f00; color:#f00;} </style> </head> <body> <div class="top">请选择信息后加入购物车</div> <div class="main"> <p class="item" name="version"> <b class="notice">版本</b> <span>ONE A2001</span> <span>ONE A0001</span> <span>ONE A1001</span> </p> <p class="item" name="color"> <b class="notice">机身颜色</b> <span>白色</span> <span>黑色</span> <span>金色</span> </p> <p class="item" name="type"> <b class="notice">套餐类型</b> <span>标配</span> <span>套餐一</span> <span>套餐二</span> </p> <p class="item" name="ram"> <b class="notice">运行内存</b> <span>2GB</span> <span>3GB</span> <span>4GB</span> </p> <p class="item" name="rom"> <b class="notice">机身内存</b> <span>16GB</span> <span>32GB</span> <span>64GB</span> </p> <p class="item" name="location"> <b class="notice">产地</b> <span>中国大陆</span> <span>港澳台</span> </p> <p class="item" name="price"> <b class="notice">价格</b> <span>999元抢购</span> </p> <p class="item1" name="num"> <b class="notice">数量</b> <input type="number" value="1" style="width:40px;height:26px;"> </p> <p style="margin-top:30px;margin-left:95px;"> <button class="bu1" id='sub'>加入购物车</button> </p> </div> <script> //children(),childrens(),parents(),siblings(),find() $(function(){ //$('.item').find('span').click(function(){ //$(this).addClass('select'); //$(this).siblings('span').removeClass('select'); //}) //console.log($('.item').siblings().find('span.select').length); $('span').click(function(){ if($(this).hasClass('select')){ $(this).removeClass('select'); }else{ $(this).addClass('select').siblings('span').removeClass('select'); } }); $('#sub').click(function(){ let form = {};//创建空数组,用来存放数据 let flag = true;//用来判断是否加入购物车 $('.item').each(function(){ if($(this).children('span.select').length != 1){ alert($(this).find('.notice').html() + '不能为空'); flag = false; }else { let key = $(this).attr('name'); let value = $(this).children('span.select').html(); form[key] = value; } }) if($('.item1 input').val() <= 0){ alert('数量不能少于1'); flag = false; }else{ form['num'] = $('.item1 input').val() console.log(form) }; if(flag){ alert('可以放入购物车了'); } }); }) </script> </body> </html>