UsernameField should use autocapitalize="none"

[Clayton Daley]

IOS devices often auto-capitalize the first letter in input fields. While this may be OK in a lot of places, it's not an acceptable behavior while usernames remain case sensitive (i.e. https://code.djangoproject.com/ticket/2273).

To address this issue, username inputs should include autocapitalize="none" among the attrs for the username (and possibly password) fields. I ran into this issue with django.contrib.auth.forms.AuthenticationForm, where autocapitalize="none" could be added to the attrs in the property-based field. However, I could see the argument for fixing it at the UsernameField so it cascades to other uses (e.g. UserCreationForm and UserChangeForm).

[Nick Pope]

Out of curiosity, is the problem solved by using autocomplete="username"? There is already #29379 open for that.

Also see a past ​comment regarding setting these attributes on the widgets from the form.

[Clayton Daley]

They all apply to inputs but are different e.g. see ​https://uxcellence.com/2014/tweaking-automatic-form-input

[pmisteliac]

PR ​https://github.com/django/django/pull/11117 posted

[Mariusz Felisiak <felisiak.mariusz@…>]

In 9410db96:

Fixed #30236 -- Made UsernameField render with autocapitalize="none" HTML attribute.

This prevents automatic capitalization, which is the default behavior in
some browsers.

[Nick Pope]

​PR to add a release note.

(A release note was added for the autocomplete attribute that was committed more recently and I think it makes sense to highlight that this common source of irritation has been addressed.)

[Mariusz Felisiak]

This is just a cleanup, I don't think that we need release notes. autocomplete is a new feature that's why it's mentioned in release notes.