How to Find Out What Character Key is Pressed with JavaScript?

We can find out which character key is pressed with the e.which property and the String.fromCharCode method.

For instance, if we have the following input:

<input type="text"  />

Then we can listen to the keypress event and check which key is pressed by writing:

const input = document.querySelector('input')  
input.addEventListener('keypress', (e) => {  
  console.log(String.fromCharCode(e.which));  
})

We call String.fromCharCode with e.which in the keypress event handler callback to get the character of the key that’s pressed.