flag-prune

Remove Unleash feature flags

Remove stale Unleash feature flags from React and Node.js code with flag-prune. See the official Unleash Node.js SDK documentation and Unleash React SDK documentation.

React useFlag

Before:

const enabled = useFlag("new-checkout")
return enabled ? <CheckoutV2 /> : <CheckoutV1 />

Preview a flag whose final value is true:

npx flag-prune --set 'useFlag("new-checkout")=true' src

Result:

return <CheckoutV2 />

After reviewing the diff:

npx flag-prune --set 'useFlag("new-checkout")=true' --write src

Node.js isEnabled

if (unleash.isEnabled("beta-search", context)) {
  showNewSearch()
} else {
  showOldSearch()
}

The rule needs only the stable prefix:

npx flag-prune --set 'unleash.isEnabled("beta-search")=false' src

This matches even though context follows the key. Required side effects in later arguments are preserved while the branch is simplified.

Variants with getVariant and useVariant

getVariant() and useVariant() return a variant object with name, enabled, and an optional payload. Give the call its final object value and flag-prune folds each static member read.

Before:

const variant = getVariant("checkout")
if (variant.enabled && variant.name === "treatment") {
  showTreatment()
} else {
  showControl()
}

Command:

npx flag-prune --set 'getVariant("checkout")={ name: "treatment", enabled: true }' src

Result:

showTreatment()

Access the payload the same way. With useVariant("checkout")={ enabled: true, payload: { type: "json", value: "{}" } }, a read of variant.payload.value folds to "{}". If the variant object is also passed somewhere as a whole value, its declaration is kept so object identity is preserved.

See all provider guides and the detailed call matching rules.

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