HTML | DOM KeyboardEvent

Last Updated : 08 Nov, 2022

It refers to the events which occur when a key is pressed on the keyboard.

Syntax:

<input type="text" onkeypress/onkeydown/onkeyup="function()/event">

Events:The following events occur on pressing a key-

onkeydown
onkeypress
onkeyup

Properties:

altKey: It returns if alt key was pressed or not.
charCode: It returns unicode character of the key.
code: It returns the code of the entered key.
ctrlKey: It returns if ctrl key was pressed or not.
getModifierState(): It returns true if the specified key is activated.
isComposing: It returns whether the event is composing or not.
key: It returns the key value.
keyCode: It returns unicode character of the onkeypress or onkey down event.
location: It returns the location of the key on the keyboard.
metaKey: It returns if meta key was pressed or not.
repeat: It returns if a key is repeatedly holding on.
shiftKey: It returns if shift key was pressed or not.
which: It returns the unicode character of event type.

Return Value: It returns events which occur when a given key is pressed from the keyboard.

Example-1: Showing onkeypress event.

html

<!DOCTYPE html> <html> <body> <h1> <center>Geeks for Geeks </center> </h1> <p>Type something in the box:</p> <input type="text" onkeypress="key()"> <script>  function key() {  alert("New Key Inserted");  }  </script> </body> </html>

Output:

Before Pressing a key:

After Pressing a key:

Example-2: Showing onkeydown event.

html

<!DOCTYPE html> <html> <body> <h1> <center>Geeks for Geeks </center> </h1> <p>Type something in the box:</p> <input type="text" onkeydown="key()"> <script>  function key() {  alert("New Key Inserted");  }  </script> </body> </html>

Output:

Before Pressing a key:

After Pressing a key:

Example-3: To check if the pressed key is Alt or not.

html

<!DOCTYPE html> <html> <body> <h1> <center>Geeks for Geeks </center> </h1> <p>Type something in the box to check if Alt key is pressed or not:</p> <input type="text" onkeydown="isKeyPressed(event)"> <p id="gfg"></p> <script>  function isKeyPressed(event) {  var x = document.getElementById("gfg");  if (event.altKey) {  x.innerHTML = "ALT Key Pressed";  } else {  x.innerHTML = "ALT Key Not Pressed";  }  }  </script> </body> </html>

Output:

Before Pressing a key:

After Pressing a key:

Example-4: To find out the pressed key from the keyboard.

html

<!DOCTYPE html> <html> <body> <h1> <center>Geeks for Geeks </center> </h1> <p>Type something in the box to know the entered key:</p> <input type="text" size="40" onkeydown="myFunction(event)"> <p id="gfg"></p> <script>  function myFunction(event) {  var x = event.key;    document.getElementById(  "gfg").innerHTML =  "Entered Key is: " + x;  }  </script> </body> </html>