Can i use socket io + javascript instead of template engine nodejs

For data communication between server and front ui node use template engine such as jade, ejs and some others. but i can send and receive dynamic data using socket.io emit and on.event function. is this the correct method or not what will be the deficiency of replacing template engine with socket.io.

I am really confuse with template engine so in short don't want to use it.

via Omeed Totakhel