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Topics

topic.subscribe()

Subscribe a handler to a topic and receive new events for processing.

import { topic } from '@nitric/sdk';

const updates = topic('updates');

updates.subscribe(async (ctx) => {
  // Log the provided message
  console.log(ctx.req.json());
});

Parameters


middleware required EventMiddleware or EventMiddleware[]

The middleware (code) to be triggered by the topic


Examples

Subscribe to a topic

import { topic } from '@nitric/sdk';

const updates = topic('updates');

updates.subscribe(async (ctx) => {
  // Log the provided message
  console.log(ctx.req.json());
});

Notes

  • A function may only subscribe to a topic once, if multiple subscribers are required, create them in different functions.
  • A function may subscribe to OR publish to a topic but not both
Previous
topic.publish()