Getting Compilation error while trying to use es6 inside the Server App.

[Gokulnath G]

I am new to the JIRA Server Plugin Development. I am trying to use ES6 js in the plugin. But while trying to compile I am getting the compilation error. 

"[ERROR] Compilation produced 2 syntax errors."

Please explain how to use es6 in the JIRA Server Plugin app and best ways to develop the plugin.