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Javascript KeyDown

 

The javascript onkeydown event occurs when the user is pressing a key (on the keyboard).

 

Syntax:

 

In HTML:

 

<element onkeydown="myScript">

 

In JavaScript:

 

object.onkeydown = function(){myScript};

 

EXAMPLE:

 

<!DOCTYPE html>
<html>
<body>

<p>Press and hold down a key inside the text field to set a red background color. Release the key to set a green background color.</p>

<input type="text" id="demo" onkeydown="keydownFunction()" onkeyup="keyupFunction()">

<script>
function keydownFunction() {
 document.getElementById("demo").style.backgroundColor = "red";
}

function keyupFunction() {
 document.getElementById("demo").style.backgroundColor = "green";
}
</script>

</body>
</html>

 

OUTPUT:

 

Javascript KeyDown