JS implements shopping cart special effects-JS Tutorial-php.cn

Effect:
1. Click the Select All button to select all, click again to deselect all
2. Click the quantity ‘ + ‘ ‘ - ‘ to automatically calculate. And the totals are kept updated. ‘-’ appears when the quantity is greater than 1. When it is less than or equal to 1, '-' disappears
3. Click Delete to realize the deletion function.
4. Click the delete button next to Select All to delete them all.
5. After selecting the product, click on the selected product to display the selected product
6. The selected product can be deselected.
<!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(&#39;*&#39;);
      for (var i = 0, len = els.length; i < len; i++) {
        if (els[i].className === cls
          || els[i].className.indexOf(cls + &#39; &#39;) >= 0
          || els[i].className.indexOf(&#39; &#39; + cls + &#39; &#39;) >= 0
          || els[i].className.indexOf(&#39; &#39; + cls) >= 0) {
          ret.push(els[i]);
        }
      }
      return ret;
    }
  }
  var cartTable = document.getElementById(&#39;cartTable&#39;);
  var tr = cartTable.children[1].rows;
  var checkInputs = document.getElementsByClassName(&#39;check&#39;);
  var checkAllInputs = document.getElementsByClassName(&#39;check-all&#39;);
  var selectedTotal = document.getElementById(&#39;selectedTotal&#39;);
  var priceTotal = document.getElementById(&#39;priceTotal&#39;);
  var selected = document.getElementById(&#39;selected&#39;);
  var foot = document.getElementById(&#39;foot&#39;);
  var selectedViewList = document.getElementById(&#39;selectedViewList&#39;);
  var deleteAll = document.getElementById(&#39;deleteAll&#39;);
  //计算
  function getTotal() {
    var seleted = 0;
    var price = 0;
    var HTMLstr = &#39;&#39;;
    for (var i = 0, len = tr.length; i < len; i++) {
      if (tr[i].getElementsByTagName(&#39;input&#39;)[0].checked) {
        tr[i].className = &#39;on&#39;;
        seleted += parseInt(tr[i].getElementsByTagName(&#39;input&#39;)[1].value);
        price += parseFloat(tr[i].cells[4].innerHTML);
        HTMLstr += &#39;<div><img src="&#39; + tr[i].getElementsByTagName(&#39;img&#39;)[0].src + &#39;"><span class="del" index="&#39; + i + &#39;">取消选择</span></div>&#39;
      }
      else {
        tr[i].className = &#39;&#39;;
      }
    }
    selectedTotal.innerHTML = seleted;
    priceTotal.innerHTML = price.toFixed(2);
    selectedViewList.innerHTML = HTMLstr;
 
    if (seleted == 0) {
      foot.className = &#39;foot&#39;;
    }
  }
  //小计
  function getSubTotal(tr) {
    var tds = tr.cells;
    var price = parseFloat(tds[2].innerHTML);
    var count = parseInt(tr.getElementsByTagName(&#39;input&#39;)[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 === &#39;check-all check&#39;) {
        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 == &#39;foot&#39;) {
      if (selectedTotal.innerHTML != 0) {
        foot.className = &#39;foot show&#39;;
      }
    }
    else {
      foot.className = &#39;foot&#39;;
    }
  }
  selectedViewList.onclick = function (e) {
    e = e || window.event;
    var el = e.srcElement;
    if (el.className == &#39;del&#39;) {
      var index = el.getAttribute(&#39;index&#39;);
      var input = tr[index].getElementsByTagName(&#39;input&#39;)[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(&#39;input&#39;)[1];
      var val = parseInt(input.value);
      var reduce = this.getElementsByTagName(&#39;span&#39;)[1];
      switch (cls) {
        case &#39;add&#39;:
          input.value = val + 1;
          reduce.innerHTML = &#39;-&#39;;
          getSubTotal(this);
          break;
        case &#39;reduce&#39;:
          if (val > 1) {
            input.value = val - 1;
          }
          if (input.value <= 1) {
            reduce.innerHTML = &#39;&#39;;
          }
          getSubTotal(this);
          break;
        case &#39;delete&#39;:
          var conf = confirm(&#39;确定要删除吗？&#39;);
          if (conf) {
            this.parentNode.removeChild(this);
          }
          break
        default :
          break;
      }
      getTotal();
    }
    tr[i].getElementsByTagName(&#39;input&#39;)[1].onkeyup = function () {
      var val = parseInt(this.value);
      var tr = this.parentNode.parentNode
      var reduce = tr.getElementsByTagName(&#39;span&#39;)[1];
      if (isNaN(val) || val < 1) {
        val = 1;
      }
      this.value = val;
      if (val <= 1) {
        reduce.innerHTML = &#39;&#39;;
      }
      else {
        reduce.innerHTML = &#39;-&#39;;
      }
      getSubTotal(tr);
      getTotal();
    }
  }
  deleteAll.onclick = function () {
    if (selectedTotal.innerHTML != &#39;0&#39;) {
      var conf = confirm(&#39;确定删除吗？&#39;);
      if (conf) {
        for (var i = 0; i < tr.length; i++) {
          var input = tr[i].getElementsByTagName(&#39;input&#39;)[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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