js简易版购物车功能_JavaScript

js简易版购物车功能

本文实例为大家分享了js购物车功能的具体代码，供大家参考，具体内容如下

<!doctype html>
<html>

  <head>
    <meta charset="utf-8">
    <title></title>
    <style>
      * {
        margin: 0;
        padding: 0;
      }

      li {
        list-style: none;
      }

      li {
        float: left;
        width: 200px;
        border: 1px #000 solid;
        margin: 10px;
      }

      li img {
        width: 200px;
      }

      p {
        height: 20px;
        border-bottom: 1px #333 dashed;
      }

      #bus {
        width: 600px;
        border: 1px #000 solid;
        height: 300px;
        clear: both;
      }

      .box1 {
        float: left;
        width: 200px;
      }

      .box2 {
        float: left;
        width: 200px;
      }

      .box3 {
        float: left;
        width: 200px;
      }

      #allmoney {
        float: right;
      }
    </style>
    <script>
      window.onload = function() {
        var olist = document.getelementbyid('list');
        var ali = olist.getelementsbytagname('li');
        var obus = document.getelementbyid('bus');

        var obj = {};
        var inum = 0;
        var allmoney = 0;

        for (var i = 0; i < ali.length; i++) {
          ali[i].ondragstart = function(ev) {
            //点击拖拽元素的时候，就设置数据，以后放到购物车的时候数据就可以传过去了
            var ev = ev || window.event;
            var ap = this.getelementsbytagname('p');
            ev.datatransfer.setdata('title', ap[0].innerhtml);
            ev.datatransfer.setdata('price', ap[1].innerhtml);
            ev.datatransfer.setdragimage(this, 0, 0);
          }
        }

        obus.ondragover = function(ev) {
          //阻止鼠标默认事件
          var ev = ev || event;
          ev.preventdefault();
        };
        obus.ondrop = function(ev) {
          var ev = ev || event;
          var title = ev.datatransfer.getdata('title');
          var price = ev.datatransfer.getdata('price');  

          if(!obj[title]){

            var op = document.createelement('p');
            var ospan = document.createelement('span');
            ospan.classname = 'box1';
            ospan.innerhtml = 1;
            op.appendchild(ospan);

            var ospan = document.createelement('span');
            ospan.classname = 'box2';
            ospan.innerhtml = title;
            op.appendchild(ospan);

            var ospan = document.createelement('span');
            ospan.classname = 'box3';
            ospan.innerhtml = price;
            op.appendchild(ospan);

            obus.appendchild(op);

            obj[title] = 1;
          }else{
            var box1 = document.getelementsbyclassname('box1');
            var box2 = document.getelementsbyclassname('box2');
            for(var i=0;i<box2.length;i++){
              if(box2[i].innerhtml == title){
                box1[i].innerhtml = parseint(box1[i].innerhtml) + 1;
              };
            };

          };
          //总价
          if(!allmoney){
            allmoney = document.createelement('div');
            allmoney.id = 'allmoney';
          }
          inum += parseint(price);
          allmoney.innerhtml = '￥'+inum;
          obus.appendchild(allmoney);
        };
      };
    </script>
  </head>

  <body>
    <ul id="list">
      <li draggable="true">
        <img src="img/img1.jpg" />
        <p>javascript语言精粹</p>
        <p>40￥</p>
      </li>
      <li draggable="true">
        <img src="img/img2.jpg" />
        <p>javascript权威指南</p>
        <p>120￥</p>
      </li>
      <li draggable="true">
        <img src="img/img3.jpg" />
        <p>精通javascript</p>
        <p>35￥</p>
      </li>
      <li draggable="true">
        <img src="img/img4.jpg" />
        <p>dom编程艺术</p>
        <p>45￥</p>
    </ul>
    <div id="bus"></div>
  </body>

</html>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持移动技术网。