Question 1

What is the difference between event.key and event.code?

Accepted Answer

event.key represents the character value of the key pressed (e.g., "a", "Enter"), while event.code represents the physical key on the keyboard (e.g., "KeyA", "Enter"). The key value can change based on keyboard layout, but the code remains constant.

Question 2

Why is event.keyCode deprecated?

Accepted Answer

event.keyCode is deprecated because it was inconsistent across browsers and keyboard layouts. Modern applications should use event.key or event.code instead, which provide more reliable and standardized values.

Question 3

How do I test keyboard events on mobile devices?

Accepted Answer

On mobile devices, use the provided button to open your virtual keyboard. Once the keyboard is visible, press any key to see the JavaScript event details just like on desktop.

Question 4

Which browsers support keyboard event testing?

Accepted Answer

All modern browsers including Chrome, Firefox, Safari, Edge, and Opera support keyboard events. The event.key and event.code properties are supported in all browsers released after 2017.

Question 5

Can I use this tool to test special keys like function keys?

Accepted Answer

Yes, KeyPress.io detects all keyboard keys including function keys (F1-F12), modifier keys (Shift, Ctrl, Alt), navigation keys (Arrow keys, Home, End), and special keys (Tab, Escape, etc.).

F4 Key Tester