表格的列点击变换
简单实例代码：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title></title>
<style>
table {
border: 1px red solid;
}
tr {
width: 100%;
height: 40px;
}
td {
width: 100px;
border: 1px darkred solid;
}
</style>
</head>
<body>
<table id="tb" cellspacing='0'>
<tr class='tr1'>
<td>1</td>
<td>1</td>
</tr>
<tr class='tr1'>
<td>2</td>
<td>2</td>
</tr>
<tr class='tr1'>
<td>3</td>
<td>3</td>
</tr>
<tr class='tr1'>
<td>4</td>
<td>4</td>
</tr>
</table>
<script>
Object.prototype.indexof = function () {
var arr = this.parentElement.children;
for (let j = 0; j < arr.length; j++) {
if (arr[j] == this) {
return j;
}
}
}
var tr = document.querySelectorAll('.tr1');
var td = document.querySelectorAll('td');
var table = document.querySelectorAll('#tb')
for (let i = 0; i < td.length; i++) {
td[i].onclick = function () {
td.forEach((el) => {
el.style.backgroundColor = 'white';
})
let x = td[i].indexof()
tr.forEach((el) => {
el.children[x].style.backgroundColor = 'blue';
})
}
}
</script>
</body>
</html>
效果图
点击前：
点击后：
