Install #

Available since 2.12.0

Register code executed when the application starts, and only once on any given environment. Once successfully executed, the code associated to an install identifier will never be run again on that environment.

If this method throws, the application won't start.

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install (id: string, handler: () => Promise<void>, description?: string): void

Usage #

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await app.install('mappings-2.4.3', () => {})