JS实现购物车特效

程序员文章站 2023-02-23 12:13:32

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...

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。

<!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>-->
  </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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