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How do we use jQuery Attribute selector with a period?
jQuery Attribute selector is used to select elements with the specified attribute and value. You can easily use it with a period (.) or a hash (#).
Example
You can try to run the following code to learn how to use jQuery selector with a period:
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$( "div[myattr*='.']" ).css("background-color", "yellow");
});
</script>
</head>
<body>
<div id="sub1" myattr="java.subject">Java</div>
<div id="sub2" myattr=".htmlsubject">HTML</div>
<div id="sub3" myattr="rubysubject">Ruby</div>
</body>
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