jquery 相对元素

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<meta charset="utf-8" />
<script src="jquery-3.3.1.js"></script>
<script>
$(function () {
$('#tb tr').click(function () {
$('td', $(this).siblings()).css('backgroundColor', '');;
$('td:even', $(this)).css('backgroundColor', 'yellow');
$('td:odd', $(this)).css('backgroundColor', 'blue');

});
});
</script>
</head>
<body>
<table border="1" id="tb" style="cursor:pointer">
<tr>
<td>单元格</td>
<td>单元格</td>
<td>单元格</td>
<td>单元格</td>
</tr>
<tr>
<td>单元格</td>
<td>单元格</td>
<td>单元格</td>
<td>单元格</td>
</tr>
<tr>
<td>单元格</td>
<td>单元格</td>
<td>单元格</td>
<td>单元格</td>
</tr>
<tr>
<td>单元格</td>
<td>单元格</td>
<td>单元格</td>
<td>单元格</td>
</tr>
</table>
</body>
</html>

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jquery 相对元素

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