More Facebook message formats

In this section, we will explore other Facebook message formats besides text. In the previous example, we programmed the chatbot to send text responses back to the user. However, Facebook has more formats that can be used to provide a richer experience to the user. You can do this by changing the content of the message element in the POST request in the sendTextMessage() method in the index.js file. 

Content types

Besides text, other content types such as images, audio and video clips, and files can be sent to users.

Image attachments

Images in JPEG, PNG, and GIF formats can be sent to the user using the following format for message content:

"message":{
    "attachment":{
      "type":"image",
      "payload":{
        "url":"https://myimagelibrary.com/ijustwannadrawsomething.jpg"
      }
    }
  }

Audio attachments

Audio clips can be sent to the user using the following message element:

 "message":{
    "attachment":{
      "type":"audio",
      "payload":{
      ...