Writing Chat App with Flask SocketIO

Using Flask-SocketIO to write a chat application.

Flask-SocketIO opens socket at server.
Javascript opens socket at client browser.
HTML5/CSS Bootstrap for client UI.
On event click, Javascript emits the messase to socket.
Flask-SocketIO accept the message and broadcast to all.
On event socket, Javascript takes the message from socket and display the message to main chat area.

Feel free to drop questions in the comment box.