JS实现购物车特效

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我是靠谱客的博主苗条睫毛膏，这篇文章主要介绍JS实现购物车特效，现在分享给大家，希望可以做个参考。

效果：

1.点击全选按钮可以全选，再点击就全不选

2.点击数量 ‘ + ' ‘ - ' 可以自动计算。并且合计保持更新。当数量大于1时‘ - '出现。小于等于1时‘ - '消失

3.点击删除可以实现删除功能。

4.点击全选旁的删除按钮可以全部删除。

5.选好商品后点击已选商品，可以显示选中的商品

6.选中的商品可以取消选择。

复制代码

<!DOCTYPE html>
<html>
<head>
 <meta charset="UTF-8">
 <title>购物车</title>
</head>
<style type="text/css">
* {
 margin: 0;
 padding: 0;
}
a {
 color: #666;
 text-decoration: none;
}
body {
 padding: 20px;
 color: #666;
}
.fl{
 float: left;
}
.fr {
 float: right;
}
table {
 border-collapse: collapse;
 border-spacing: 0;
 border: 0;
 text-align: center;
 width: 937px;
}
th, td {
 border: 1px solid #CADEFF;
}
th {
 background: #e2f2ff;
 border-top: 3px solid #a7cbff;
 height: 30px;
}
td {
 padding: 10px;
 color: #444;
}
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;
}
.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 {
 width: 80px;
}
.operation span:hover, a:hover {
 cursor: pointer;
 color: red;
 text-decoration: underline;
}
img {
 width: 100px;
 height: 80px;
 /*border: 1px solid #ccc;*/
 margin-right: 10px;
 float: left;
}

.foot {
 width: 935px;
 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: 20px;
 margin-bottom: -20px;
}
#selectedViewList div{
 display: inline-block;
 position: relative;
 width: 100px;
 height: 80px;
 border: 1px solid #ccc;
 margin: 10px;
}
#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: RGBA(0,0,0,.5);
 cursor: pointer;
}
#selectedViewList div:hover span {
 display: block;
}
</style>
<body>
<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="http://cdn.attach.qdfuns.com/notes/pics/201612/21/075704loo2mdzuux5123gu.jpg.editor.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="http://cdn.attach.qdfuns.com/notes/pics/201612/21/075704m26zvv6e52sjczee.jpg.editor.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="http://cdn.attach.qdfuns.com/notes/pics/201612/21/075704etdabo2fpppdplsa.jpg.editor.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="http://cdn.attach.qdfuns.com/notes/pics/201612/21/075823wdtw1pdvf3wbwd8b.jpg.editor.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" href="javascript：;">删除</a>
 <div class="fr closing">结 算</div>
 <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>
  <span class="arrow">◆<span>◆</span></span>
 </div>
</div>
<script>
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 === cls
     || 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 cartTable = document.getElementById('cartTable');
 var tr = cartTable.children[1].rows;
 var checkInputs = document.getElementsByClassName('check');
 var checkAllInputs = document.getElementsByClassName('check-all');
 var selectedTotal = document.getElementById('selectedTotal');
 var priceTotal = document.getElementById('priceTotal');
 var selected = document.getElementById('selected');
 var foot = document.getElementById('foot');
 var selectedViewList = document.getElementById('selectedViewList');
 var deleteAll = document.getElementById('deleteAll');
 //计算
 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';
  }
 }
 //小计
 function getSubTotal(tr) {
  var tds = tr.cells;
  var price = parseFloat(tds[2].innerHTML);
  var count = parseInt(tr.getElementsByTagName('input')[1].value);
  var SubTotal = parseFloat(price * count);
  tds[4].innerHTML = SubTotal.toFixed(2);
 }
 for (var i = 0 , len = checkInputs.length; i < len; i++) {
  checkInputs[i].onclick = function () {
   if (this.className === 'check-all check') {
    for (var j = 0; j < checkInputs.length; j++) {
     checkInputs[j].checked = this.checked;
    }
   }
   if (this.checked == false) {
    for (var k = 0; k < checkAllInputs.length; k++) {
     checkAllInputs[k].checked = false;
    }
   }
   getTotal();
  }
 }
 selected.onclick = function () {
  if (foot.className == 'foot') {
   if (selectedTotal.innerHTML != 0) {
    foot.className = 'foot show';
   }
  }
  else {
   foot.className = 'foot';
  }
 }
 selectedViewList.onclick = function (e) {
  e = e || window.event;
  var el = e.srcElement;
  if (el.className == 'del') {
   var index = el.getAttribute('index');
   var input = tr[index].getElementsByTagName('input')[0];
   input.checked = false;
   input.onclick();
  }
 }
 for (var i = 0; i < tr.length; i++) {
  tr[i].onclick = function (e) {
   e = e || window.event;
   var el = e.srcElement;
   var cls = el.className;
   var input = this.getElementsByTagName('input')[1];
   var val = parseInt(input.value);
   var reduce = this.getElementsByTagName('span')[1];
   switch (cls) {
    case 'add':
     input.value = val + 1;
     reduce.innerHTML = '-';
     getSubTotal(this);
     break;
    case 'reduce':
     if (val > 1) {
      input.value = val - 1;
     }
     if (input.value <= 1) {
      reduce.innerHTML = '';
     }
     getSubTotal(this);
     break;
    case 'delete':
     var conf = confirm('确定要删除吗？');
     if (conf) {
      this.parentNode.removeChild(this);
     }
     break
    default :
     break;
   }
   getTotal();
  }
  tr[i].getElementsByTagName('input')[1].onkeyup = function () {
   var val = parseInt(this.value);
   var tr = this.parentNode.parentNode
   var reduce = tr.getElementsByTagName('span')[1];
   if (isNaN(val) || val < 1) {
    val = 1;
   }
   this.value = val;
   if (val <= 1) {
    reduce.innerHTML = '';
   }
   else {
    reduce.innerHTML = '-';
   }
   getSubTotal(tr);
   getTotal();
  }
 }
 deleteAll.onclick = function () {
  if (selectedTotal.innerHTML != '0') {
   var conf = confirm('确定删除吗？');
   if (conf) {
    for (var i = 0; i < tr.length; i++) {
     var input = tr[i].getElementsByTagName('input')[0];
     if (input.checked) {
      tr[i].parentNode.removeChild(tr[i]);
      i--;
     }
    }
   }
  }
 }
 checkAllInputs[0].checked = true;
 checkAllInputs[0].onclick();
}
</script>
</body>
</html>

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<!DOCTYPE html>
<html>
<head>
 <meta charset="UTF-8">
 <title>购物车</title>
</head>
<style type="text/css">
* {
 margin: 0;
 padding: 0;
}
a {
 color: #666;
 text-decoration: none;
}
body {
 padding: 20px;
 color: #666;
}
.fl{
 float: left;
}
.fr {
 float: right;
}
table {
 border-collapse: collapse;
 border-spacing: 0;
 border: 0;
 text-align: center;
 width: 937px;
}
th, td {
 border: 1px solid #CADEFF;
}
th {
 background: #e2f2ff;
 border-top: 3px solid #a7cbff;
 height: 30px;
}
td {
 padding: 10px;
 color: #444;
}
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;
}
.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 {
 width: 80px;
}
.operation span:hover, a:hover {
 cursor: pointer;
 color: red;
 text-decoration: underline;
}
img {
 width: 100px;
 height: 80px;
 /*border: 1px solid #ccc;*/
 margin-right: 10px;
 float: left;
}

.foot {
 width: 935px;
 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: 20px;
 margin-bottom: -20px;
}
#selectedViewList div{
 display: inline-block;
 position: relative;
 width: 100px;
 height: 80px;
 border: 1px solid #ccc;
 margin: 10px;
}
#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: RGBA(0,0,0,.5);
 cursor: pointer;
}
#selectedViewList div:hover span {
 display: block;
}
</style>
<body>
<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="http://cdn.attach.qdfuns.com/notes/pics/201612/21/075704loo2mdzuux5123gu.jpg.editor.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="http://cdn.attach.qdfuns.com/notes/pics/201612/21/075704m26zvv6e52sjczee.jpg.editor.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="http://cdn.attach.qdfuns.com/notes/pics/201612/21/075704etdabo2fpppdplsa.jpg.editor.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="http://cdn.attach.qdfuns.com/notes/pics/201612/21/075823wdtw1pdvf3wbwd8b.jpg.editor.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" href="javascript：;">删除</a>
 <div class="fr closing">结 算</div>
 <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>-->
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