JS购物车
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/** * Created by an.han on 13-12-17. */ window.onload = function () { if (!document.getElementsByClassName) { document.getElementsByClassName = function (cls) { var ret = []; var els = document.getElementsByTagName(\'*\'); for (var i = 0, len = els.length; i < len; i++) { if (els[i].className.indexOf(cls + \' \') >=0 || els[i].className.indexOf(\' \' + cls + \' \') >=0 || els[i].className.indexOf(\' \' + cls) >=0) { ret.push(els[i]); } } return ret; } } var table = document.getElementById(\'cartTable\'); // 购物车表格 var selectInputs = document.getElementsByClassName(\'check\'); // 所有勾选框 var checkAllInputs = document.getElementsByClassName(\'check-all\') // 全选框 var tr = table.children[1].rows; //行 var selectedTotal = document.getElementById(\'selectedTotal\'); //已选商品数目容器 var priceTotal = document.getElementById(\'priceTotal\'); //总计 var deleteAll = document.getElementById(\'deleteAll\'); // 删除全部按钮 var selectedViewList = document.getElementById(\'selectedViewList\'); //浮层已选商品列表容器 var selected = document.getElementById(\'selected\'); //已选商品 var foot = document.getElementById(\'foot\'); // 更新总数和总价格，已选浮层 function getTotal() { var seleted = 0; var price = 0; var htmlstr = \'\'; for (var i = 0, len = tr.length; i < len; i++) { if (tr[i].getElementsByTagName(\'input\')[0].checked) { tr[i].className = \'on\'; seleted += parseInt(tr[i].getElementsByTagName(\'input\')[1].value); price += parseFloat(tr[i].cells[4].innerHTML); HTMLstr += \'<div><img src="\' + tr[i].getElementsByTagName(\'img\')[0].src + \'"><span class="del" index="\' + i + \'">取消选择</span></div>\' } else { tr[i].className = \'\'; } } selectedTotal.innerHTML = seleted; priceTotal.innerHTML = price.toFixed(2); selectedViewList.innerHTML = HTMLstr; if (seleted == 0) { foot.className = \'foot\'; } } // 计算单行价格 function getSubtotal(tr) { var cells = tr.cells; var price = cells[2]; //单价 var subtotal = cells[4]; //小计td var countInput = tr.getElementsByTagName(\'input\')[1]; //数目input var span = tr.getElementsByTagName(\'span\')[1]; //-号 //写入HTML subtotal.innerHTML = (parseInt(countInput.value) * parseFloat(price.innerHTML)).toFixed(2); //如果数目只有一个，把-号去掉 if (countInput.value == 1) { span.innerHTML = \'\'; }else{ span.innerHTML = \'-\'; } } // 点击选择框 for(var i = 0; i < selectInputs.length; i++ ){ selectInputs[i].onclick = function () { if (this.className.indexOf(\'check-all\') >= 0) { //如果是全选，则吧所有的选择框选中 for (var j = 0; j < selectInputs.length; j++) { selectInputs[j].checked = this.checked; } } if (!this.checked) { //只要有一个未勾选，则取消全选框的选中状态 for (var i = 0; i < checkAllInputs.length; i++) { checkAllInputs[i].checked = false; } } getTotal();//选完更新总计 } } // 显示已选商品弹层 selected.onclick = function () { if (selectedTotal.innerHTML != 0) { foot.className = (foot.className == \'foot\' ? \'foot show\' : \'foot\'); } } //已选商品弹层中的取消选择按钮 selectedViewList.onclick = function (e) { var e = e || window.event; var el = e.srcElement; if (el.className==\'del\') { var input = tr[el.getAttribute(\'index\')].getElementsByTagName(\'input\')[0] input.checked = false; input.onclick(); } } //为每行元素添加事件 for (var i = 0; i < tr.length; i++) { //将点击事件绑定到tr元素 tr[i].onclick = function (e) { var e = e || window.event; var el = e.target || e.srcElement; //通过事件对象的target属性获取触发元素 var cls = el.className; //触发元素的class var countInout = this.getElementsByTagName(\'input\')[1]; // 数目input var value = parseInt(countInout.value); //数目 //通过判断触发元素的class确定用户点击了哪个元素 switch (cls) { case \'add\': //点击了加号 countInout.value = value + 1; getSubtotal(this); break; case \'reduce\': //点击了减号 if (value > 1) { countInout.value = value - 1; getSubtotal(this); } break; case \'delete\': //点击了删除 var conf = confirm(\'确定删除此商品吗？\'); if (conf) { this.parentNode.removeChild(this); } break; } getTotal(); } // 给数目输入框绑定keyup事件 tr[i].getElementsByTagName(\'input\')[1].onkeyup = function () { var val = parseInt(this.value); if (isNaN(val) || val <= 0) { val = 1; } if (this.value != val) { this.value = val; } getSubtotal(this.parentNode.parentNode); //更新小计 getTotal(); //更新总数 } } // 点击全部删除 deleteAll.onclick = function () { if (selectedTotal.innerHTML != 0) { var con = confirm(\'确定删除所选商品吗？\'); //弹出确认框 if (con) { for (var i = 0; i < tr.length; i++) { // 如果被选中，就删除相应的行 if (tr[i].getElementsByTagName(\'input\')[0].checked) { tr[i].parentNode.removeChild(tr[i]); // 删除相应节点 i--; //回退下标位置 } } } } else { alert(\'请选择商品！\'); } getTotal(); //更新总数 } // 默认全选 checkAllInputs[0].checked = true; checkAllInputs[0].onclick(); }
@charset "utf-8"; *{margin:0;padding:0;list-style-type:none;} a{color:#666;text-decoration:none;} table{border-collapse:collapse;border-spacing:0;border:0;} body{color:#666;font:12px/180% Arial, Helvetica, sans-serif, "新宋体";} clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden} .clearfix{display:inline-table} *html .clearfix{height:1%} .clearfix{display:block} *+html .clearfix{min-height:1%} .fl{float:left;} .fr{float:right;} .catbox{width:940px;margin:0 auto;} .catbox table{text-align:center;width:100%;} .catbox table th,.catbox table td{border:1px solid #CADEFF;} .catbox table th{background:#e2f2ff;border-top:3px solid #a7cbff;height:30px;} .catbox table td{padding:10px;color:#444;} .catbox table tbody tr:hover{background:RGB(238,246,255);} .checkbox{width:60px;} .goods{width:300px;} .goods span{width:180px;margin-top:20px;text-align:left;float:left;} .goods img{width:100px;height:80px;margin-right:10px;float:left;} .price{width:130px;} .count{width:90px;} .count .add, .count input, .count .reduce{float:left;margin-right:-1px;position:relative;z-index:0;} .count .add, .count .reduce{height:23px;width:17px;border:1px solid #e5e5e5;background:#f0f0f0;text-align:center;line-height:23px;color:#444;} .count .add:hover, .count .reduce:hover{color:#f50;z-index:3;border-color:#f60;cursor:pointer;} .count input{width:50px;height:15px;line-height:15px;border:1px solid #aaa;color:#343434;text-align:center;padding:4px 0;background-color:#fff;z-index:2;} .subtotal{width:150px;color:red;font-weight:bold;} .operation span:hover,a:hover{cursor:pointer;color:red;text-decoration:underline;} .foot{margin-top:10px;color:#666;height:48px;border:1px solid #c8c8c8;background-color:#eaeaea;background-image:linear-gradient(RGB(241,241,241),RGB(226,226,226));position:relative;z-index:8;} .foot div, .foot a{line-height:48px;height:48px;} .foot .select-all{width:100px;height:48px;line-height:48px;padding-left:5px;color:#666;} .foot .closing{border-left:1px solid #c8c8c8;width:100px;text-align:center;color:#000;font-weight:bold;background:RGB(238,238,238);cursor:pointer;} .foot .total{margin:0 20px;cursor:pointer;} .foot #priceTotal, .foot #selectedTotal{color:red;font-family:"Microsoft Yahei";font-weight:bold;} .foot .selected{cursor:pointer;} .foot .selected .arrow{position:relative;top:-3px;margin-left:3px;} .foot .selected .down{position:relative;top:3px;display:none;} .show .selected .down{display:inline;} .show .selected .up{display:none;} .foot .selected:hover .arrow{color:red;} .foot .selected-view{width:935px;border:1px solid #c8c8c8;position:absolute;height:auto;background:#ffffff;z-index:9;bottom:48px;left:-1px;display:none;} .show .selected-view{display:block;} .foot .selected-view div{height:auto;} .foot .selected-view .arrow{font-size:16px;line-height:100%;color:#c8c8c8;position:absolute;right:330px;bottom:-9px;} .foot .selected-view .arrow span{color:#ffffff;position:absolute;left:0px;bottom:1px;} #selectedViewList{padding:10px 20px 10px 20px;} #selectedViewList div{display:inline-block;position:relative;width:100px;height:80px;border:1px solid #ccc;margin:10px;float:left;} #selectedViewList div img{width:100px;height:80px;margin-right:10px;float:left;} #selectedViewList div span{display:none;color:#ffffff;font-size:12px;position:absolute;top:0px;right:0px;width:60px;height:18px;line-height:18px;text-align:center;background:#000;cursor:pointer;} #selectedViewList div:hover span{display:block;}
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>购物车</title> <link rel="stylesheet" href="css/style.css"/> <script type="text/javascript" src="js/demo.js"></script> </head> <body> <div class="catbox"> <table id="cartTable"> <thead> <tr> <th><label><input class="check-all check" type="checkbox"/> 全选</label></th> <th>商品</th> <th>单价</th> <th>数量</th> <th>小计</th> <th>操作</th> </tr> </thead> <tbody> <tr> <td class="checkbox"><input class="check-one check" type="checkbox"/></td> <td class="goods"><img src="images/1.jpg" alt=""/><span>Casio/卡西欧 EX-TR350</span></td> <td class="price">5999.88</td> <td class="count"><span class="reduce"></span><input class="count-input" type="text" value="1"/><span class="add">+</span></td> <td class="subtotal">5999.88</td> <td class="operation"><span class="delete">删除</span></td> </tr> <tr> <td class="checkbox"><input class="check-one check" type="checkbox"/></td> <td class="goods"><img src="images/2.jpg" alt=""/><span>Canon/佳能 PowerShot SX50 HS</span></td> <td class="price">3888.50</td> <td class="count"><span class="reduce"></span><input class="count-input" type="text" value="1"/><span class="add">+</span></td> <td class="subtotal">3888.50</td> <td class="operation"><span class="delete">删除</span></td> </tr> <tr> <td class="checkbox"><input class="check-one check" type="checkbox"/></td> <td class="goods"><img src="images/3.jpg" alt=""/><span>Sony/索尼 DSC-WX300</span></td> <td class="price">1428.50</td> <td class="count"><span class="reduce"></span><input class="count-input" type="text" value="1"/><span class="add">+</span></td> <td class="subtotal">1428.50</td> <td class="operation"><span class="delete">删除</span></td> </tr> <tr> <td class="checkbox"><input class="check-one check" type="checkbox"/></td> <td class="goods"><img src="images/4.jpg" alt=""/><span>Fujifilm/富士 instax mini 25</span></td> <td class="price">640.60</td> <td class="count"><span class="reduce"></span><VSCode自定义代码片段9——JS中的面向对象编程js代码片段: utils/lcoalStorage/cookie