"Recently we had a fun talk at the office, 'how many days have I been working here?' turns out the answer was almost exactly 1500 days. So I thought it would be fun to make a web part that could help you keep track of those fun days."
"name":"Build your first SharePoint client-side web part",
"description":"Client-side web parts are client-side components that run in the context of a SharePoint page. Client-side web parts can be deployed to SharePoint environments that support the SharePoint Framework. You can also use modern JavaScript web frameworks, tools, and libraries to build them.",