Get Unicode Value of Pressed Keyboard Key using JavaScript

You can Get Unicode Value of Pressed Keyboard Key using JavaScript with the help of keyCode property or KeyboardEvent which Property.

keyCode property

keyCode property returns the unicode value of the key that has triggered the onkeypress, onkeydown or onkeyup event.

For normal keyboard keys like alphabets or numbers use onkeypress event with keyCode property and for special function keys like CTRL, ALT etc, use keyCode property with onkeyup event or onkeydown.

Firefox browser doesn't support keyCode property, so we can use which property for it.

HTML Code

The HTML code is given below.

<input type="text" onkeypress="getUnicode(event)">

JavaScript Code

The JavaScript code is given below.

<script>
function getUnicode(event) {
  var x = event.keyCode;
  x="Unicode value is "+x;
  alert(x);
}
</script>

KeyboardEvent which Property

KeyboardEvent which Property also returns the unicode of the key pressed just like the keyCode property.

IE8 and earlier versions of Internet Explorer don't support which property so we can use keyCode property for them.

HTML Code

The HTML code is given below.

<input type="text" onkeypress="getUnicode(event)">

JavaScript Code

The JavaScript code is given below.

<script>
function getUnicode(event) {
  var x = event.which;
  x="Unicode value is "+x;
  alert(x);
}
</script>

Using Both keyCode and which Property

We can use both keyCode and which property simultaneously so that the code runs on all types of browsers, see the code below.

<script>
function getUnicode(event) {
  var x = event.which || event.keyCode;
  x="Unicode value is "+x;
  alert(x);
}
</script>

Demo

Video Tutorial

Watch video tutorial on how to get value of unicode of the pressed key of keyboard.

How to Change Image on Hover with JavaScript How to Disable Button by Class Name in JavaScript How To Change Image Size with JavaScript How to change Image opacity with JavaScript How to Change image src on click with JavaScript How to get the lang attribute value in JavaScript How to Get attribute Value using JavaScript How To Check if Attribute Exists or not with JavaScript How To Count number of links on Page with JavaScript How To Scroll Page to Bottom using JavaScript How To Detect Shift Key Press with JavaScript Change Text Color On Hover with JavaScript Hide and Show div using JavaScript Get Button text with JavaScript Get textarea value with JavaScript Get table row Height with JavaScript Auto Increase width of input field with JavaScript Set Textarea maxLength with JavaScript Set Textarea Value with JavaScript JavaScript Count list items JavaScript set input field value Count Button Clicks with JavaScript Scroll Page to the Top on Click with JavaScript Change id of Element with JavaScript JavaScript Change li Text Color