URL Overrides
Share exact flag states via URL query parameters.
You can override any flag's value with a URL query parameter. This is useful for sharing exact flag states with teammates for QA, demos, or reviews.
Format
Prefix flag names with vf: in the query string:
Rules
- URL params take priority over
localStoragevalues - URL params are ephemeral — they are not written to
localStorageand don't persist across page loads - Boolean flags accept
trueorfalse— any other value is ignored - Select flags accept any value that matches a registered option — values not in the options list are ignored
Examples
Override a single boolean flag
Override multiple flags
QA workflow
- Set up your flags in the toolbar to the exact state you want to share
- Construct the URL with
vf:query parameters matching those values - Send the link to a teammate — they see the same flag state without affecting their local storage
This makes it easy to share specific UI states in pull request descriptions, bug reports, or Slack messages.