ng-pristine and ng-dirty

[anmolsharma25]

I have created a from using the form builder. User puts the data in the fields and redirected to a confirm page, if user wants to correct any thing, they can go back, and change the data. When they return to the form, I am retaining the previously inserted data in the form. But still its does not change ng-pristine to ng-dirty. Could please help me with this issue.

thanks in advance