3 Sites for SharePoint Developer Aspects

The following are three sites to utilize for SharePoint Development aspects:

SharePoint Dev Center

https://developer.microsoft.com/en-us/sharepoint

 

SharePoint Developer Documentation:

https://docs.microsoft.com/en-us/sharepoint/dev/

 

Plan customizations, solutions, and apps for SharePoint:

https://docs.microsoft.com/en-us/sharepoint/extend-and-develop