Since SharePoint 2019 doesn't come with certain features out of the box, eg. Column headers that stay in place while scrolling, I am in the process of learning SharePoint framework.
Are there any good resources out there that can guide me with learning SPFX? I've used Pluralsight and Microsoft docs - they are good for basic development. I need more intermediate stuff.
I need to be able to build in-depth Web Parts and extensions. Any help would be appreciated.