Description: Selects elements that have the specified attribute with a value either equal to a given string or starting with that string followed by a hyphen (-).
This selector was introduced into the CSS specification to handle language attributes.
<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
<a href="example.html" hreflang="en">Some text</a>
<a href="example.html" hreflang="en-UK">Some other text</a>
<script>$('a[hreflang|=en]').css('border','3px dotted green');</script>
</body>
</html>