<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
<script src="jquery-3.5.1.min.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
$(document).ready(function() {
var jqHchb = $("#head-checkbox");
jqHchb.click(function() {
$("table input:checkbox").prop("checked", true);
});
});
</script>
</head>
<body>
<table border="" cellspacing="" cellpadding="">
<tr>
<th>
<input type="checkbox" name="" id="head-checkbox" value="" />
</th>
<th>Header</th>
</tr>
<tr>
<td>
<input type="checkbox" name="" id="" value="" />
</td>
<td>Data1</td>
</tr>
<tr>
<td>
<input type="checkbox" name="" id="" value="" />
</td>
<td>Data2</td>
</tr>
</table>
</body>
</html>
