Publish

To send a message to a topic, use publish() method with your topic name and the message:

await PubSub.publish('myTopic1', { msg: 'Hello to all subscribers!' });

If multiple providers are defined in your app you can pass the message to a specific provider:

await PubSub.publish('myTopic1', { msg: 'Hello to all subscribers!' }, { provider: 'AWSIoTProvider' });

You can also publish a message to multiple topics:

await PubSub.publish(['myTopic1','myTopic2'], { msg: 'Hello to all subscribers!' });

Note: If you do not include a specific provider it will publish a message to all of the configured PubSub providers in your app.