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用JS模拟购物车（jQuery实现）

2016-04-08 22:01 543 查看
jQueryShoppingCart.html
jQueryCart.html
<!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="js/jquery-1.11.1.js"></script>
<script>
function add_shoppingcart(btn) {
var $tr = $(btn).parent().parent();
var name = $tr.children().eq(0).html();
var price = parseInt($tr.children().eq(1).html());

var $ntr = $(
'<tr>'+
'<td>'+name+'</td>'+
'<td>'+price+'</td>'+
'<td align="center">'+
'<input type="button" value="-" onclick="reduce_amount(this);"/> '+
'<input type="text" size="3" readonly value="1"/>'+
'<input type="button" value="+" onclick="add_amount(this);"/> '+
'</td>'+
'<td>'+price+'</td>'+
'<td align="center"><input type="button" value="x" onclick="del_shoppingcart(this);"/></td>'+
'</tr>'
);

var $tbody = $("#goods");
$tbody.append($ntr);

changeTotal();
}

function del_shoppingcart(btn) {
var $tr = $(btn).parent().parent();
$tr.remove();

changeTotal();
}

function reduce_amount(btn) {
var amount = parseInt($(btn).next().val());
if(amount==0) {
return;
}
amount--;
$(btn).next().val(amount);

var price = parseInt($(btn).parent().prev().html());
$(btn).parent().next().html(parseInt($(btn).parent().next().html())-price);

changeTotal();
}

function add_amount(btn) {
var amount = parseInt($(btn).prev().val());
amount++;
$(btn).prev().val(amount);

var price = parseInt($(btn).parent().prev().html());
$(btn).parent().next().html(parseInt($(btn).parent().next().html())+price);

changeTotal();
}

function changeTotal() {
var total = 0;
var $trs = $("#goods tr");
var price = 0;
$trs.each(function() {
price = parseInt($(this).children().eq(3).html());
total += price
});
$("#total").html(total);
}
</script>
</head>
<body>
<h1>真划算</h1>
<table>
<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="add_shoppingcart(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="add_shoppingcart(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="add_shoppingcart(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="add_shoppingcart(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="add_shoppingcart(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>
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