There are 1 repository under sharepoint2019 topic.
This repository hosts well-written and tested formulas that you can use in JSON Column Formatting, SharePoint Calculated Column, Column Validation, and Project Server custom Fields.
SP2019 Search webpart (Search Box, Refiners/Filters, Pagination and Search Results)
SharePoint modern web-parts component: Table and Form
Copy large files from Source SharePoint library to Destination SharePoint library into small chunks.
Fully customizable SharePoint in one SPFx extension.