onNewMessage()

Registers a function to call when a new message is sent from a customer, agent, or supervisor. Available in API version 29.0 or later.

Name	Type	Description
`chatKey`	string	The `chatKey` associated with the chat for which to call a function when a new customer message is received.
`callback`	function	JavaScript method called upon completion of the method.

This method is asynchronous so it returns its response in an object in a callback method. The response object contains the following properties:

Name	Type	Description
`content`	String	The text of a message in the chat log.
`name`	String	The name of the user who sent the message. This appears exactly as it is displayed in the chat log.
`type`	String	The type of message that was received, such as an Agent or Visitor message.
`timestamp`	Date/Time	The date and time the message was received.
`success`	Boolean	`true` if firing event was successful; `false` if firing event wasn’t successful.