HTML
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>原生JS实现购物车结算功能代码</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 id="x">
<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>
<input class="count-input" type="text" value="1"/>
<span class="add">+</span></td>
<td class="subtotal">640.60</td>
<td class="operation"><span class="delete">删除</span></td>
</tr>
</tbody>
</table>
<div class="foot" id="foot">
<label class="fl select-all"><input type="checkbox" class="check-all check"/> 全选</label>
<a class="fl delete" id="deleteAll" >删除</a>
<div class="fr closing" >结 算</div>
<input type="hidden" id="cartTotalPrice" />
<div class="fr total">合计：￥<span id="priceTotal">0.00</span></div>
<div class="fr selected" id="selected">已选商品<span id="selectedTotal">0</span>件<span class="arrow up">︽</span><span class="arrow down">︾</span></div>
<div class="selected-view">
<div id="selectedViewList" class="clearfix">
<div><img src="images/1.jpg"><span>取消选择</span></div>
</div>
<span class="arrow">◆<span>◆</span></span> </div>
</div>
</div>
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</body>
</html>
CSS
@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:100px 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;}
.check-all{ vertical-align:middle;}
.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;}
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.foot{margin-top:0px;color:#666;height:48px;border:1px solid #c8c8c8;border-top:0;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:80px;height:48px;line-height:48px;color:#666;text-align:center;}
.foot .delete{padding-left:10px;}
.foot .closing{border-left:1px solid #c8c8c8;width:103px;text-align:center;color:#666;font-weight:bold;cursor:pointer;background-image:linear-gradient(RGB(241,241,241),RGB(226,226,226));}
.foot .closing:hover{background-image:linear-gradient(RGB(226,226,226),RGB(241,241,241));color:#333;}
.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:938px;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;}
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#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;}
JS
window.onload=function(){
let checkAlls=document.getElementsByClassName('check-all')
let checks=document.getElementsByClassName('check-one')
let inputs=document.getElementsByClassName('count-input')
let selectedTotal=document.getElementById('selectedTotal')
let subtotals=document.getElementsByClassName('subtotal')
let prices=document.getElementsByClassName('price')
let adds=document.getElementsByClassName('add')
let reduces=document.getElementsByClassName('reduce')
let deletes=document.getElementsByClassName('delete')
let tbo=document.getElementsByTagName('tbody')
let trs=x.getElementsByTagName('tr')
console.log(trs,tbo)
//全选按钮功能
for(let n=0
checkAlls[n].onchange=function(){
for(let x=0
//所有单选按钮跟随变化
checks[x].checked=this.checked
}
//另一个全选按钮发生变化
checkAll(this.checked)
//调用统计和金额方法
Sum()
}
}
\
//单选按钮
for(let n=0
checks[n].onchange=function(){
checkOne()
Sum()
}
}
\
//添加减去-按钮
for(let n=0
adds[n].index=n
reduces[n].index=n
adds[n].onclick=function(){
inputs[this.index].value++
com()
Sum()
}
reduces[n].onclick=function(){
inputs[this.index].value--
if(inputs[this.index].value<=0){
inputs[this.index].value=0
}
com()
Sum()
}
}
\
//input框鼠标离开功能
for(let n=0
inputs[n].index=n
inputs[n].onblur=function(){
if(inputs[this.index].value<=0){
inputs[this.index].value=0
}
com()
Sum()
}
}
\
//删除功能
for(let n=0
deletes[n].onclick=function(){
let tr=this.parentNode.parentNode
let tbody=tr.parentNode
tbody.removeChild(tr)
for(let n=0
adds[n].index=n
reduces[n].index=n
inputs[n].index=n
}
}
}
\
\
\
//封装单选按钮功能
function checkOne(){
let sss=0
for(let x=0
if(checks[x].checked){
sss++
if(sss==checks.length){
checkAll('true')
}
com()
}else{
checkAll()
}
}
}
\
//封装统计和金额方法
function Sum(){
let sum=0 //统计
let num=0 //金额
for(let x=0
if(checks[x].checked){
sum+=Number(inputs[x].value)
num+=parseFloat(subtotals[x].innerHTML)
}
selectedTotal.innerHTML=sum
priceTotal.innerHTML=num.toFixed(2)
}
}
\
//封装改变全选按钮状态方法
function checkAll(s){
for(let x=0
checkAlls[x].checked=s
}
}
//封装小计方法
function com(){
for(let x=0
subtotals[x].innerHTML=(prices[x].innerHTML*inputs[x].value).toFixed(2)
}
\
}
