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10 lines
712 B
Markdown
10 lines
712 B
Markdown
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In HedgeDoc we use an event system based on [EventEmitter2][eventemitter2]. It's used to reduce circular dependencies between different services and inform these services about changes.
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HedgeDoc's system is basically [the system NestJS offers][nestjs/eventemitter].
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The config for the `EventEmitterModule` is stored in `events.ts` and exported as `eventModuleConfig`.
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In the same file enums for the event keys are defined. Each of these events is expected to be sent with an additional value. In the enum defintion a comment should tell you what exactly this value should be.
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[eventemitter2]: https://github.com/EventEmitter2/EventEmitter2
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[nestjs/eventemitter]: https://docs.nestjs.com/techniques/events
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