Fixed #22383 -- Added support for HTML5 required attribute on required form fields.

django/forms/boundfield.py

@@ -85,6 +85,8 @@ class BoundField(object):
             widget.is_localized = True
 
         attrs = attrs or {}
+        if not widget.is_hidden and self.field.required and self.form.use_required_attribute:
+            attrs['required'] = True
         if self.field.disabled:
             attrs['disabled'] = True
         auto_id = self.auto_id