Changing type of input is now okay ?

Changing type of input is now okay ?

Hello,
I was doing some research on changing the type of an <input /> using jQuery and I found multiple answers saying that jQuery forbids this as it doesn't work in IE.

However, I tried it and it is working. Meaning, it doesn't throw an error and prevent me from doing it like my research said it would.

Is this allowed in jQuery now? Is it supported in IE now by 1.9 ?