<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="./js/jquery.min.js"></script>
</head>
<body>
<div class="cart-thead">
<div class="t-checkbox">我是上面的
<input type="checkbox" name="" id="" class="checkall">
</div>
</div>
<div class="cart-item-list">
<div class="p-checkbox">香蕉
<input type="checkbox" name="" id="" class="j-checkbox">
</div>
<div class="p-checkbox">苹果
<input type="checkbox" name="" id="" class="j-checkbox">
</div>
<div class="p-checkbox">葡萄
<input type="checkbox" name="" id="" class="j-checkbox">
</div>
</div>
<div class="cart-floatbar">
<div class="selectall">我是全选的
<input type="checkbox" name="" id="" class="checkall">
</div>
</div>
<script>
//全选
$(function() {
//全选按钮状态给三个小的
//事件用change
$(".checkall").change(function() {
//跟随全选按钮状态变化
console.log($(this).prop("checked"));
$(".j-checkbox,.checkall").prop("checked", $(this).prop("checked"));
})
})
</script>
</body>
</html>
运行结果
