Disable autocapitalize for the user login field on wp-login.php

[johnbillion]

When logging in to WordPress with Chrome on Android, the Username or Email Address field has autocapitalization enabled, which is not desirable. Using Chrome or Safari on iOS the field is not autocapitalized, but I'm not sure why (might be an iOS thing).

Autocapitalization can be disabled using the autocapitalize="off" attribute. This should be applied to the user_login field when logging in, performing a password reset, registering, etc.

[drywallbmb]

Seems straightforward enough.... right?

[SergeyBiryukov]

Replying to johnbillion:

When logging in to WordPress with Chrome on Android, the Username or Email Address field has autocapitalization enabled, which is not desirable.

Hmm, could not reproduce with Chrome 62 on Android 5.1.1 or 4.3.0.

Per ​https://developers.google.com/web/updates/2015/04/autocapitalize, autocapitalize="off" is the default value. Has something changed since that post?

[johnbillion]

I'm running Android 7.1. Something might have changed. I don't have any older Android devices immediately to hand to test.

[SergeyBiryukov]

Nevermind, reproduced with default keyboard (previously was running Gboard). 42886.diff​ works as expected.

[johnbillion]

In 42406:

Login and Registration: Instruct the browser to disable autocapitalisation for the user login field on the login screen.

Props drywallbmb
Fixes #42886