For web-pages I use Plotly Javascript.
Done only for demo purposes.
Trying out different effects with CSS3.
Done during my studies.
I took Udemy course about React.
One small demo of course exercises.
Simple web-page about IT law in Estonia.
Done for school subject.
Done in Jupyter Notebook and when downloaded as HTML.
A simple UI for file upload.
Done for a Hackathon challenge.
Simple PHP exercises.
Done for different school subjects.
A Python application for playing with Mendel laws.
Done as pair-work for university course.
Different small exercises with Javascript.