In SharePoint 2013, and SharePoint Online classic experience, you were able to modify the way you view fields/columns in the list view, item view, new view and edit view by using JS link.
A client of ours needs to advanced search functionality to populate one of their columns using the SharePoint Online modern document library experience. I would be able to build the functionality using JSLink, but by the looks of it, JSLink is no longer supported.
Is there a replacement for JSLink in the modern design?
Thanks in advance!
You could build field-extension in SPFx in modern list view, you could check below official guideline.
official guideline