MDN uses feature toggles to integrate un-finished feature changes as early as possible, and to control the behavior of finished features.
Waffle switches are simple booleans - they are either on or off.
application_ACAO- Enable Access-Control-Allow-Origin=0 header.
dumb_doc_urls- (deprecated) Disable the render-time changing of /docs/ URLs to the equivalent Zone URLs (see PR 3331 for reasoning).
store_revision_ips- Save request data, including the IP address, to enable marking revisions as spam.
welcome_email- Send welcome email to new user registrations.
wiki_error_on_delete- Throw an error if a user tries to delete a page.
wiki_force_immediate_rendering- Force wiki pages to render immediately in the same http request in which they are saved (not in a background process).
newsletter- Show newsletter sign-up site wide.
newsletter_article- Show newsletter sign-up in article footer (must be used in combination with
foundation_callout- show Foundation donation tile on homepage.
Waffle flags control behavior by specific users, groups, percentages, and other advanced criteria.
compat_api- View the new API-backed compatibility tables.
kumabanned- (deprecated) added to users to mark them as banned.
kumaediting- Enable/disable wiki editing.
page_move- (deprecated) enable/disable page move feature.
registration_disabled- Enable/disable new user registration.
search_doc_navigator- Show the search doc navigator feature.
search_suggestions- Show the advanced search filter suggestions interface.
section_edit- Show section edit buttons.
sg_task_completion- Enable the Survey Gizmo pop-up.
spam_admin_override- Tell Akismet that edits are never spam.
spam_spammer_override- Tell Akismet that edits are always spam.
spam_testing_mode- Tell Akismet that edits are tests, not real content.
spam_checks_enabled- Toggle spam checks site wide.
spam_submissions_enabled- Toggle Akismet spam/spam submission ability.
wiki_samples- Add button to open samples in Codepen or jsFiddle.
wiki_spam_exempted- Exempt users and user groups from checking. submissions for spam.
wiki_spam_training- Call Akismet to check submissions, but don’t block due to detected spam or Akismet errors.