NestJS · Senior · Question 54 of 75

What's the difference between `onModuleInit` and `onApplicationBootstrap`?

1onApplicationBootstrap runs on every request
✓Correct answer: onModuleInit runs when a module's providers are ready; onApplicationBootstrap runs after all modules are initialized, before the app starts listening
3They are identical

Explanation

Use onApplicationBootstrap for work that needs the whole app, like warming caches that use several modules.

Further reading

NestJS: Lifecycle events ↗

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