specify the number of keyboards , in my openion is a very important feature to be added to your chat app.
if you were typing a message , then you must reply another message , so you can use another keyboard bar to reply without lossing your typed message.
the template of the chat from : https://www.youtube.com/watch?v=Hrz3DzZDIt0
you may visit https://chatfeature.000webhostapp.com/ or in github server https://laithdribaty.github.io/feature-that-all-chat-apps-should-have-vue.js-app/ or just download the file , then extract it , then open index.html and enjoy using the feature