Ticket #13037: css_classes_documentation.diff

docs/ref/forms/api.txt

@@ -645 +645 @@
     >>> str(f['subject'].errors)
     ''
 
+.. versionadded:: 1.2
+
+If the field is required or contain errors, and you've set any or both of the
+``error_css_class`` and ``required_css_class`` attributes; you can access a
+string of CSS-classes for the field by calling its ``css_classes`` method.
+
 .. _binding-uploaded-files:
 
 Binding uploaded files to a form