Client.publish()

Publish a message synchronously.

Signature

client.publish(topic, payload, options)

Parameter	Type	Description
topic	string	Topic to publish to
payload	string \| ArrayBuffer	Message payload (string or binary data)
options	object	Optional publish configuration
options.qos	number	Quality of Service level (0, 1, or 2). Default: 0
options.retain	boolean	Whether the message should be retained by the broker. Default: false
options.tags	object	Custom tags for metrics (key-value pairs)