invariant

Configure message stripping

In your app Entrypoint, configure message stripping to avoid exposing error messages in production.

If omitted invariant will display error messages.

import { invariant, isServer } from '@crustack/utils'

// in production, strip the error message on the client.
invariant.config({
  stripMessage: !isServer && process.env.NODE_ENV === 'production',
})

Assert conditions

Use invariant to check conditions. Pass a condition and a descriptive error message. The message can be a string or a function to defer message creation until needed.

import { invariant } from '@crustack/utils'

invariant(condition, 'The condition must be truthy.')