• 原生JS实现购物车结算功能代码+zepto版


    html

    <!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>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"/>&nbsp;&nbsp;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>
              <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"/>&nbsp;&nbsp;全选</label>
        <a class="fl delete" id="deleteAll" href="javascript:;">删除</a>
        <div class="fr closing" onclick="getTotal();">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><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>
    </body>
    </html>

    js:

    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; //
        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();
    }

    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;}
    /*素材家园 - www.sucaijiayuan.com*/
    .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;}
    
    .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;}
    
    #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;}

    zepto版本:

    <!DOCTYPE html>
    <html lang="en">
    
    <head>
      <meta charset="UTF-8">
      <title>牛汽配微信商城版 </title>
      <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0">
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      <meta name="apple-mobile-web-app-capable" content="yes">
      <meta name="apple-mobile-web-app-status-bar-style" content="black">
      <meta name="apple-touch-fullscreen" content="yes">
      <meta name="apple-itunes-app" content="app-id=979472604">
      <meta name="format-detection" content="telephone=no">
      <meta name="x5-fullscreen" content="true">
      <meta http-equiv="Expires" content="-1">
      <meta http-equiv="Cache-Control" content="no-cache">
      <meta http-equiv="Pragma" content="no-cache">
      <meta name="author" content="m.sopell.com">
      <link rel="stylesheet" href="/h5/style/sprite.css">
      <link rel="stylesheet" href="/h5/style/weixin.css">
      <script>
      var dpr, rem, scale;
      var docEl = document.documentElement;
      var metaEl = document.querySelector('meta[name="viewport"]');
    
      dpr = window.devicePixelRatio || 1;
    
      function browser() {
        var u = navigator.userAgent;
        return {
          isWeiXin: u.match(/MicroMessenger/),
          mobile: !!u.match(/AppleWebKit.*Mobile.*/),
          ios: !!u.match(/(i[^;]+;( U;)? CPU.+Mac OS X/),
          android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1
        }
      }
      var b = browser();
      if (b.mobile) {
        rem = docEl.clientWidth * dpr / 10;
      } else {
        rem = 54;
      }
    
      scale = 1 / dpr;
      // 设置viewport,进行缩放,达到高清效果
      metaEl.setAttribute('content', 'width=device-width, initial-scale=' + scale + ',maximum-scale=' + scale + ', minimum-scale=' + scale + ',user-scalable=no');
    
      // 设置data-dpr属性,留作的css hack之用
      docEl.setAttribute('data-dpr', dpr);
      docEl.style.fontSize = rem + 'px';
      </script>
    </head>
    
    <body>
      <div class="view">
        <div class="content">
          <!-- 中间主内容区域-->
          <div class="cart-wrap">
            <div class="productsListWrap cartListWrap">
              <ul class="productsList cartList" id="cartTable">
                <!-- 正常商品 -->
                <li>
                  <div class="items" price="1600.50" subtotal="1600.50">
                    <div class="cart-check-wrapper">
                      <input class="check-one check icon-selected" type="checkbox" />
                    </div>
                    <div class="product-img">
                      <a href="">
                        <img src="../images/product1.jpg" alt="" width="100%" height="100%">
                      </a>
                    </div>
                    <div class="product-desc cart-desc">
                      <dl>
                        <dt class="product-name">
                          <a href="">固特异 轮胎 225/50R17 98Y</a>
                        </dt>
                        <dd class="product-car">205/55R16 V 91</dd>
                        <dd class="product-prices cart-prices">¥1060.50</dd>
                        <div class="cart-opt">
                          <span class="quantity-decrease" href="javascript:void();">-</span>
                          <input type="text" size="4" value="1" name="num" class="quantity" readonly="readonly">
                          <span class="quantity-increase" href="javascript:void();">+</span>
                        </div>
                      </dl>
                    </div>
                  </div>
                </li>
                <!-- 失效可删除商品 -->
                <li>
                  <div class="items">
                    <div class="cart-check-wrapper">
                      <input class="check-one check disabled" disabled type="checkbox" />
                    </div>
                    <div class="product-img">
                      <a href="">
                        <img src="../images/product1.jpg" alt="" width="100%" height="100%">
                      </a>
                    </div>
                    <div class="product-desc cart-desc">
                      <dl>
                        <dt class="product-name deleted">
                          <a href="">固特异 轮胎 225/50R17 98Y</a>
                        </dt>
                        <dd class="product-car">205/55R16 V 91</dd>
                        <dd class="product-prices cart-prices cart-overdue">商品已失效</dd>
                        <span class="cart-wastebin">删除</span>
                      </dl>
                    </div>
                  </div>
                </li>
              </ul>
            </div>
          </div>
        </div>
      </div>
      <!-- 底部购物车 -->
      <div class="cart-fixed">
        <div class="cart-total-bar">
          <div class="cart-check-wrapper">
            <input class="check-all check icon-selected" type="checkbox" />
            <span class="all-text">全选</span>
          </div>
          <div class="cart-info">
            <div class="cart-info-hj">
              <span class="hj">合计:</span>
              <span class="hj-price" id="priceTotal">0.00</span>
            </div>
          </div>
        </div>
        <div class="cart-bar">
          <div class="cart-bar-back">
            <a href="" class="ios icon-back1"></a>
          </div>
          <div class="cart-bar-list">
            <a href="" class="red-color" id="add_cart">
              <span>结算</span>
            </a>
          </div>
        </div>
      </div>
      <script src="/h5/js/zepto.min.js"></script>
      <script src="/h5/js/popup.js"></script>
      <script type="text/javascript">
      $(function() {
        var table = $('#cartTable'); // 购物车表格
        var selectInputs = $('.check'); // 所有勾选框
        var checkAllInputs = $('.check-all'); // 全选框
        var tr = table.children(); //
        var priceTotal = $('#priceTotal'); //总计
    
        //更新总数和总价格
        function getTotal() {
          var price = 0;
          tr.each(function(index) {
            if ($(this).find('.check').is(':checked')) {
              $(this).addClass('on');
              price += parseFloat($(this).find('.items').attr('subtotal'));
            } else {
              $(this).attr('class', '');
            }
          });
          priceTotal.text(price.toFixed(2));
        }
    
        // 计算单行价格
        function getSubtotal(tr) {
          var item = tr.find('.items');
          var price = tr.find('.items').attr('price'); //单价
          var subtotal = tr.find('.items').attr('subtotal'); //小计td
          var countInput = tr.find('.quantity').val(); //小计td
          //写入HTML
          subtotal = (parseInt(countInput) * parseFloat(price)).toFixed(2);
          item.attr('subtotal', subtotal)
            //console.log(item.attr('subtotal'));
        }
    
        // 点击选择框
        selectInputs.each(function() {
          this.onclick = function() {
            if ($(this).hasClass('check-all')) { //如果是全选,则吧所有的选择框选中
              for (var j = 0; j < selectInputs.length; j++) {
                if (!selectInputs[j].disabled) {
                  selectInputs[j].checked = this.checked;
                }
              }
            }
            if (!this.checked) { // 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
          };
        });
    
        //为每行元素添加事件
        tr.each(function(index) {
          $(this).on('click', function(e) {
            var el = e.target || e.srcElement; // 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 = $(this).find('.quantity'); // 数目input
            var value = parseInt(countInout.val()); // 数目
            //通过判断触发元素的class确定用户点击了哪个元素
            switch (cls) {
              case 'quantity-increase': //点击了加号
                countInout.val(value + 1);
                getSubtotal($(this));
                break;
              case 'quantity-decrease': //点击了减号
                if (value > 1) {
                  countInout.val(value - 1);
                  getSubtotal($(this));
                }
                break;
              case 'cart-wastebin': //点击了删除
                var _this = this;
                $('body').popup({
                  message: '确认删除',
                  id: 'pop-2',
                  hideTitle: true,
                  onOk: function() {
                    _this.parentNode.removeChild(_this);
                  }
                });
            }
            getTotal();
    
          });
    
        });
    
        checkAllInputs[0].checked = true;
        checkAllInputs[0].onclick();
    
      });
      </script>
    </body>
    
    </html>
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  • 原文地址:https://www.cnblogs.com/woodk/p/5320136.html
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