It's fairly easy to do actually, if you're willing to accept the cheat I've used in the past.
You can read the input value with Javascript, so if you add an 'unmask password' button, then that button should effectively replace the input type=password with an input type=password and populate it with the values previously stored in the password element.
There are a number of ways to do this, but switching out elements was the easiest for me -- of course, browsers have come a long way since that implementation. YMMV.
You can read the input value with Javascript, so if you add an 'unmask password' button, then that button should effectively replace the input type=password with an input type=password and populate it with the values previously stored in the password element.
There are a number of ways to do this, but switching out elements was the easiest for me -- of course, browsers have come a long way since that implementation. YMMV.