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2021
12-11

jquery实现购物车功能

本文实例为大家分享了jquery实现购物车功能的具体代码，供大家参考，具体内容如下

html

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​<!DOCTYPE html>
<html>
<head>
<title>购物车</title>
<meta charset="utf-8" />
<style type="text/css">
h1 {
    text-align: center;
}
  
table {
    margin: 0 auto;
    width: 60%;
    border: 2px solid #aaa;
    border-collapse: collapse;
}
  
table th, table td {
    border: 2px solid #aaa;
    padding: 5px;
}
  
th {
    background-color: #eee;
}
</style>
<script src="jquery-3.2.1.min.js"></script>
<script src="gw.js"></script>
</head>
<body>
    <h1>真划算</h1>
    <table id="tb1">
        <tr>
            <th>商品</th>
            <th>单价(元)</th>
            <th>颜色</th>
            <th>库存</th>
            <th>好评率</th>
            <th>操作</th>
        </tr>
        <tr>
            <td>罗技M185鼠标</td>
            <td>80</td>
            <td>黑色</td>
            <td>893</td>
            <td>98%</td>
            <td align="center"><input type="button" value="加入购物车"
                onclick="addshoping(this);" /></td>
        </tr>
        <tr>
            <td>微软X470键盘</td>
            <td>150</td>
            <td>黑色</td>
            <td>9028</td>
            <td>96%</td>
            <td align="center"><input type="button" value="加入购物车"
                onclick="addshoping(this);" /></td>
        </tr>
        <tr>
            <td>洛克iphone6手机壳</td>
            <td>60</td>
            <td>透明</td>
            <td>672</td>
            <td>99%</td>
            <td align="center"><input type="button" value="加入购物车"
                onclick="addshoping(this);" /></td>
        </tr>
        <tr>
            <td>蓝牙耳机</td>
            <td>100</td>
            <td>蓝色</td>
            <td>8937</td>
            <td>95%</td>
            <td align="center"><input type="button" value="加入购物车"
                onclick="addshoping(this);" /></td>
        </tr>
        <tr>
            <td>金士顿U盘</td>
            <td>70</td>
            <td>红色</td>
            <td>482</td>
            <td>100%</td>
            <td align="center"><input type="button" value="加入购物车"
                onclick="addshoping(this);" /></td>
        </tr>
    </table>
  
    <h1>购物车</h1>
    <table>
        <thead>
            <tr>
                <th>商品</th>
                <th>单价(元)</th>
                <th>数量</th>
                <th>金额(元)</th>
                <th>删除</th>
            </tr>
        </thead>
        <tbody id="goods">
  
        </tbody>
        <tfoot>
            <tr>
                <td colspan="3" align="right">总计</td>
                <td id="total"></td>
                <td></td>
            </tr>
        </tfoot>
    </table>
  
</body>
</html>

js

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//添加购物车
function addshoping(btn) {
  
        var name = $(btn).parent().siblings().eq(0).html()
        var price = $(btn).parent().siblings().eq(1).html()
  
         var trs = $("#goods tr")
         var nameArr = new Array();
         $.each(trs, function (index, value) {
             nameArr.push($(this).children('td').eq(0).text())
         })
        var $tr = $('<tr>' +
            '<td>' + name + '</td>' +
            '<td>' + price + '</td>' +
            '<td align="center">' +
            '<input type="button" value="-" onclick="jian(this);"/> ' +
            '<input type="number" size="3" readonly value="1"/> ' +
            '<input type="button" value="+" onclick="increase(this);"/>' +
            '</td>' +
            '<td>' + price + '</td>' +
            '<td align="center"><input type="button" value="x" onclick="del(this);"/></td>' +
            '</tr>');
        var ishasName = nameArr.indexOf(name)
         
        if (ishasName >= 0) {
            var goodcount=trs.eq(ishasName).children('td').eq(2).children().eq(1).val()
            Number.parseInt(goodcount);
            trs.eq(ishasName).children('td').eq(2).children().eq(1).val(++goodcount)
            var price=trs.eq(ishasName).children('td').eq(1).html()
             Number.parseInt(price)
             trs.eq(ishasName).children('td').eq(3).html(goodcount*price);
             
                 
        } else {
  
           // $tr.insertAfter($("#goods tr:eq(0)"))
            $("#goods").append($tr);
         }
            var kucun = tds.eq(3).html()
   Number.parseInt(kucun)
   tds.eq(3).html(--kucun)
  
        sum()
    }
    //增加
    function increase(btn){
        var num=$(btn).prev().val()
        Number.parseInt(num);
        var bignew=$(btn).prev().val(++num)
        var price = $(btn).parent().prev().html();
        $(btn).parent().next().html(num*price);
        sum();
     
    };
    //减少
    function jian(btn){
         
        var num=$(btn).next().val()
        if(num<=1){
            return;
        }
        Number.parseInt(--num)
        var price = $(btn).parent().prev().html();
        var newprice=$(btn).parent().next().html();
         
        $(btn).parent().next().html(newprice-price);
        $(btn).next().val(num)
       
    sum()
    }
    //删除
    function del(btn){
       $(btn).parent().parent().remove()
       sum();
    }
    //总和
    function sum() {
// 获取tbody下的所有行
var $trs = $("#goods tr");
// 遍历他们
var sum = 0;
for (var i = 0; i < $trs.length; i++) {
    // 获取每一行
    var $tr = $trs.eq(i);
    // 获取该行中第四列的值(金额)
    var mny = $tr.children().eq(3).html();
    sum += parseFloat(mny);
}
// 写入到合计
$("#total").html(sum);
};

运行结果：

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自学编程网。

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