jQuery keyup()

The jQuery keyup() method is used to attach a function to run when a keyup event occurs i.e. when a keyboard button is released after pressing.

Syntax:

To trigger the keyup event for selected elements.

$(selector).keyup()

To add a function to the keyup event.

$(selector).keyup(function)

Function:

  • It is an optional parameter.
  • The function parameter specifies the function to run when the event occurs.

Example:

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
("input").keyup(function(){
$("input").css("background-color", "red");
});
});
</script>
</head>
<body>
Write something: <input type="text">
</body>
</html>