Detect Alt Gr (Alt Graph) modifier on key press

Question

In the javascript Event object, there are some boolean values to check if modifier keys are pressed:

• ctrlKey: CTRL key.

Answer 1

I guess the ALTGR key and CTRL+ALT key combo are the same thing and there is no way to make a difference in Javascript. Pressing ALTGR+e and CTRL+ALT+e are both producing the € (euro) symbol on my keyboard/language setup. There are pages online to check keycodes. Hope this helps.