Progress Bar </>

Progress bar tells the user the application is busy doing something and she needs wait. It should be used especially when the action in progress takes more than few seconds to complete to keep the conversation going with the user and make the interface feel faster and more responsive.
Keep the progress bar simple, show it close to where the action is, and make the bar indicate the progress of the task.

JQuery 1.11.3 in use.

Useful links