JavaScript实现复选框全选功能
时间：2023-01-21 09:41:13 | 栏目：JavaScript代码 | 点击：次
本文实例为大家分享了JavaScript实现复选框全选的具体代码，供大家参考，具体内容如下
代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
table {
width: 300px;
border-spacing: 0;
/* text-align: center; */
margin: 100px auto;
border-collapse: collapse;
}
table tr:nth-child(n+2)>td {
text-align: left;
background-color: rgb(250, 245, 245);
color: dimgray;
font-size: 14px;
}
table tr:nth-child(1) {
background-color: skyblue;
color: white;
}
th,
td {
padding: 10px;
border: 0.5px solid gray;
}
</style>
</head>
<body>
<table>
<tr>
<th><input type="checkbox" name="" id="all"></th>
<th>商品</th>
<th>价格</th>
</tr>
<tr>
<td><input type="checkbox" name="" id="ip8"></td>
<td>iPhone8</td>
<td>8000</td>
</tr>
<tr>
<td><input type="checkbox" name="" id="pro"></td>
<td>iPad Pro</td>
<td>5000</td>
</tr>
<tr>
<td><input type="checkbox" name="" id="air"></td>
<td>iPad Air</td>
<td>2000</td>
</tr>
<tr>
<td><input type="checkbox" name="" id="watch"></td>
<td>Apple Watch</td>
<td>2000</td>
</tr>
</table>
<script>
var all = document.getElementById('all');
var items = document.querySelectorAll('tr>td>input');
all.onclick = function() {
for (var i = 0; i < items.length; i++) {
items[i].checked = this.checked;
}
}
for (var i = 0; i < items.length; i++) {
items[i].onclick = function() {
var flag_all = 1;
for (var j = 0; j < items.length; j++) {
if (items[j].checked == 0) {
flag_all = 0;
all.checked = flag_all;
break;
}
}
all.checked = flag_all;
}
}
</script>
</body>
</html>