jquery add attribute
$( some_item ).attr( "id", "some-id" );
// for setting multiple attributes, it's similar to the css() property. However, quotes are not always required for attr()
$( some_item ).attr({
id: "some-id",
// or others.
title: "Opens in a new window",
// attributes which contain dash(-), should be covered in quotes.
"data-value": "internal link"
});
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery Adding Attribute to HTML Element</title>
<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<script>
$(document).ready(function(){
$(".add-attr").click(function(){
$('input[type="checkbox"]').attr("checked", "checked");
});
});
</script>
</head>
<body>
<button type="button" class="add-attr">Select Checkbox</button>
<input type="checkbox">
</body>
</html>
