Javascript DOM onkeyup Event via addEventListener() method

Introduction

In JavaScript, using the addEventListener() method: 

object.addEventListener("keyup",
       myScript);

This example uses the addEventListener() method to attach a "keyup" event to an input element.

Press a key inside the text field and release it to set a red background color.

View in separate window 

<!DOCTYPE html>
<html>
<body>
Enter your name: <input type="text" id="fname">

<script>
document.getElementById("fname").addEventListener("keyup", myFunction);

function myFunction() {//from  w  w  w  .j a  va2  s .c  om
  var x = document.getElementById("fname");
  x.value = x.value.toUpperCase();
}
</script>

</body>
</html>
Bubbles:
Cancelable:
Event type:
Supported HTML tags:












 Yes
Yes
KeyboardEvent
All HTML elements,
EXCEPT:
<base>,
<bdo>,
<br>,
<head>,
<html>,
<iframe>,
<meta>,
<param>,
<script>,
<style>, and
<title>



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