Publish

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

1await pubsub.publish({ topics: 'myTopic1', message: { msg: 'Hello to all subscribers!' } });

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

1await pubsub.publish({ 
2  topics: 'myTopic1',
3  message: { msg: 'Hello to all subscribers!' },
4  options: { provider: 'AWSIoTProvider' }
5});

You can also publish a message to multiple topics:

1await pubsub.publish({ topics: ['myTopic1','myTopic2'], message: { msg: 'Hello to all subscribers!' } });