Save form as Draft without filling all mandatory fields

Hi there,

I have a CRM form which has a lot of fields, now user cannot fill all these fields in one go. Hence, we have introduced another button which is Save As Draft, which will allow user to complete the application in pieces.

Now for this button, I want to let the user save the form and do not want to take out the mandatory check from the fields which will be required for completion of the application.

How can I achieve this via javaScript in D365?