Even if it's buggy, I figure it'd at least be consistently buggy. Part of what spurred me to make this was an issue I had with account setup for a local utility

Even if it's buggy, I figure it'd at least be consistently buggy. Part of what spurred me to make this was an issue I had with account setup for a local utility's website; their client-side validity check for creating a new password was apparently using different logic than the backend code. I kept trying to create a password, the web page said it was valid, then I'd hit submit and get rejected for having an invalid password.