效果图：
canvas.png
html：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>模拟购物车功能-jq</title>
<link rel="stylesheet" href="bootstrap-3.3.7-dist/css/bootstrap.min.css" />
<link rel="stylesheet" href="css/shopCart.css" />
<script type="text/javascript" src="js/jquery-2.1.0.js" ></script>
</head>
<body>
<table class="table">
<tr>
<th id="checkAll"><label><input type="checkbox" checked />全选</label><button>删除</button></th>
<th>商品名称</th>
<th>商品价格(元)</th>
<th>数目</th>
<th>小计(元)</th>
<th>操作</th>
</tr>
<tr>
<td class="check"><label><input type="checkbox" checked /></label></td>
<td>商品名称1</td>
<td class="price">22.50</td>
<td><span class="sub">-</span><input type="text" value="1" class="num"/><span class="add">+</span></td>
<td class="subtotal">22.50</td>
<td class="del"><button>删除</button></td>
</tr>
<tr>
<td class="check"><label><input type="checkbox" checked /></label></td>
<td>商品名称2</td>
<td class="price">12.50</td>
<td><span class="sub">-</span><input type="text" value="1" class="num"/><span class="add">+</span></td>
<td class="subtotal">12.50</td>
<td class="del"><button>删除</button></td>
</tr>
<tr>
<td class="check"><label><input type="checkbox" checked /></label></td>
<td>商品名称3</td>
<td class="price">110.40</td>
<td><span class="sub">-</span><input type="text" value="1" class="num"/><span class="add">+</span></td>
<td class="subtotal">110.40</td>
<td class="del"><button>删除</button></td>
</tr>
<tr>
<td colspan="5" style="text-align: right;">总件数：<i id="numAll">0</i>件 总计：<i id="total">0.00</i>元</td>
</tr>
</table>
<script src="js/jquery-2.1.0.js" type="text/javascript" charset="utf-8"></script>
<script src="js/shopCart.js" type="text/javascript" charset="utf-8"></script>
</body>
</html>
css样式：
*{
margin:0;
padding: 0;
}
table th,table td,input{
text-align: center;
}
table #checkAll{
width: 150px;
}
table #checkAll label{
cursor: pointer;
background: url(../img/confirm.png) no-repeat center left;
padding-left:10px;
}
table .check label{
cursor: pointer;
background: url(../img/confirm.png) no-repeat center;
}
table #checkAll input, table .check input{
visibility: hidden;
}
table input[type="text"]{
width: 50px;
overflow: hidden;
}
table span{
display: inline-block;
width: 20px;
background: #8C8C8C;
margin:0px 5px ;
color: #FFFFFF;
cursor: pointer;
}
js：
$(function() {
// 全选
$("#checkAll input").click(function() {
var flag = $(this).prop("checked");
if(flag) {
$(".check label input").prop("checked", true);
$("#checkAll label").css("background", "url(img/confirm.png) no-repeat center left");
$(".check label").css("background", "url(img/confirm.png) no-repeat center");
} else {
$(".check label input").prop("checked", false);
$("#checkAll label").css("background", "url(img/confirm_no.png) no-repeat center left");
$(".check label").css("background", "url(img/confirm_no.png) no-repeat center");
}
counts();
totalPrice();
});
//单选
$(".check input").click(function() {
var flag = $(this).prop("checked"); //获取当前input的状态
var CL = $(".check input").length; //列表长度；
var CH = $(".check input:checked").length; //列表中被选中的长度
if(flag) {
$(this).parent("label").css("background", "url(img/confirm.png) no-repeat center");
} else {
$(this).parent("label").css("background", "url(img/confirm_no.png) no-repeat center");
}
if(CL == CH) {
$("#checkAll input").prop("checked", true);
$("#checkAll label").css("background", "url(img/confirm.png) no-repeat center left");
} else {
$("#checkAll input").prop("checked", false);
$("#checkAll label").css("background", "url(img/confirm_no.png) no-repeat center left");
}
counts();
totalPrice();
})
//数目加
$(".add").click(function() {
var num = $(this).prev().val();
var price = parseFloat($(this).parent().siblings(".price").text());
num++;
$(this).prev().val(num);
// 小计
$(this).parent().siblings(".subtotal").text((price * num).toFixed(2));
counts();
totalPrice();
})
//数目减
$(".sub").click(function() {
var num = $(this).next().val();
var price = parseFloat($(this).parent().siblings(".price").text());
num--;
if(num <= 0) {
num = 0
}
$(this).next().val(num);
// 小计
$(this).parent().siblings(".subtotal").text((price * num).toFixed(2));
counts();
totalPrice();
})
//文本框脱里焦点处理
$('.num').each(function(i) {
$(this).blur(function() {
let p = parseFloat($(this).parents('tr').find(".subtotal").text());
let c = parseFloat(this.value);
console.log(p*c);
$(this).parents('tr').find(".subtotal").text((c * p).toFixed(2));
counts();
totalPrice();
})
})
//单行删除
$(".del button").click(function() {
var flag = $(this).parent().siblings().find("input").prop("checked");
if(flag) {
if(confirm("是否确定删除")) {
$(this).parents("tr").remove();
var CL = $(".check input").length; //列表长度；
if(CL == 0) {
$("#checkAll label input").prop("checked", false);
$("#checkAll label").css("background", "url(img/confirm_no.png) no-repeat center left");
}
counts();
totalPrice();
}
}
})
//全删除
$("#checkAll button").click(function() {
var flag = $(this).prev().children().prop("checked");
// console.log(flag);
if(flag) {
if(confirm("是否确定删除")) {
$(".check").parent().remove();
var CL = $(".check input").length; //列表长度；
if(CL == 0) {
$("#checkAll label input").prop("checked", false);
$("#checkAll label").css("background", "url(img/confirm_no.png) no-repeat center left");
}
counts();
totalPrice();
}
}
})
//总价格
totalPrice();
function totalPrice() {
var prices = 0;
$('.check input:checked').each(function(i) {
console.log()
prices += parseFloat($(this).parents("tr").find('.subtotal').text());
})
$('#total').text(prices);
}
//总数目
counts();
function counts() {
var sum = 0;
$('.check input:checked').each(function(i) {
sum += parseInt($(this).parents("tr").find('.num').val());
})
$('#numAll').text(sum);
}
})
