Why does event[1] return undefined but console.log(event) seems to return an array?

Question

The console.log return this which looks like and array : keyup charCode=0, keyCode=18 But I tried event[1] to get the keycode but it's undefined, how do I extract the keycode from this ?

function processKeyDown(event)
{
    console.log(event);
}

Answer 1

this is because event is an object, not an indexed based array. use event.keyCode instead.

Answer 2

Use event.keyCode to access the key that was pressed.