Delivered function to capture the fragment part of the url

Hi

We are trying to integrate MFA with PeopleSoft for authentication. The response from the Authenticator is appending to the Landing page URL with a fragment '#'. We are not able to capture the full url, i.e. any value appearing after this fragment #. We want to convert this fragment into a query parameter so that the full URI function can capture the url including the string which we will use to decode and perform Authentication.

Can you help provide the technical function or code to achieve this or a approach to achieve this.