HTML Event attribute: onfocus
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The HTML onfocus attribute specifies the event
that is triggered when an element gets focus. It applies to all visible elements.
EXAMPLE:
HTML USED IN THIS EXAMPLE:
<!DOCTYPE html>
<html> <!-- Copyright (c) Nematrian Limited 2018 -->
<head></head>
<body>
onfocus: try giving focus to (starting to enter text in) this input field
<input type="text" id="focusinput" onfocus="myOnfocus()"><br>
<script>
function myOnfocus() {document.getElementById("focusinput").style.background="orange";}
</script>
</body>
</html>
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