CustomActions that deploy script, JSLinks, and additional web parts on the page are currently not supported in the new experience. Environments that require these unsupported features should continue using classic mode for the time being.
Throughout this year, we will be addressing critical scenario gaps to make the new document library experience support custom processes, commands, and other functionality required for complex, business-critical workflows in complex organizations. Specific capabilities we are investigating building include the ability to host web parts on the page, the ability to define custom view layouts and conditional formatting, and the ability to be visually customized and branded with client-side design pacakages. In the coming weeks we’ll share additional information surrounding these extensibility opportunities across lists and libraries.Joseph Ackerman supported this idea ·