flag-prune

Remove LaunchDarkly feature flags

Remove stale LaunchDarkly feature flags from React and JavaScript code with flag-prune. See the official React Web SDK documentation and flag evaluation documentation.

React typed variation hooks

const enabled = useBoolVariation("new-dashboard", false)
return enabled ? <NewDashboard /> : <OldDashboard />

Preview, then write after reviewing the diff:

npx flag-prune --set 'useBoolVariation("new-dashboard")=true' src
npx flag-prune --set 'useBoolVariation("new-dashboard")=true' --write src

The fallback argument may differ between call sites because it follows the configured flag-key prefix. Typed string and number hooks work with replacement values of the same primitive type.

JavaScript variation

const layout = client.variation("checkout-layout", context, "standard")

if (layout === "treatment") {
  showTreatment()
}

Preview the final string value:

npx flag-prune --set 'client.variation("checkout-layout")=treatment' src

The context and fallback may vary. The client name, method, and flag key must match exactly. LaunchDarkly React Web SDK v4 deprecates useFlags; prefer typed hooks for new code and straightforward primitive replacement.

See all provider guides and the detailed call matching rules.

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