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What is onkeyup event in JavaScript?

The onkeyup event triggers when a key is released.

Example

You can try to run the following code to learn how to work with onkeyup event in JavaScript −

<html>
   <head>
      <script>
         <!--
            function sayHello() {
               var str = document.getElementById("subject");
               str.value = str.value.toLowerCase();
            }
         //-->
      </script>
   </head>
   <body>
      <p>Enter subject below in upper case and see what happpens.</p>
      <input type = "text" onkeyup = "sayHello()" id = "subject">
   </body>
</html>
Updated on 19-Jun-2020 11:18:47

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