
Hi @SHUO .H ,
It’s been a long time, how are you doing recently?
According to my research, you can use PnP/Sp or Pnp/Js to develop SPFx webpart in SharePoint Server 2019.
Here are a few good articles for your reference:
- Use @pnp/sp (PnPJS) library with SharePoint Framework web parts
- Workaround for on-premises SPFx TypeScript Version (SharePoint 2016 or 2019)
- Getting Started with SharePoint Framework
Note
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Thanks,
Echo Du
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