Trial work for ShareCloud OÜ. The project is based on Microsoft's example project (yo @microsoft/sharepoint).
It displays a list of tasks that the users are able to add to, remove from and change the parameters of. The tasks are displayed in a table that shows the quarter and weeks of quarter, highlighting every week that has a quarter on it.
The solution is in src/webparts/HelloWorld/components/.
It is a sharepoint plugin that can be used in sharepoint.
npm install
gulp trust-dev-cert
gulp serve