When you are performing multiple ajax call like searching, paginating or sorting , server may takes much time to send response. The purpose of the Datatable custom loader is to show to the user that while the action has not yet completed, the computer is working on their request. As long as the interface clearly indicates to the user that their request was received and is pending, then the UI element has done its job.

By default datatable has a text loader “Processing…”, you can customize the message by…