Through building my own note taking app I came into contact with quite a few web-based WYSIWYG editors.

Rich text editors are famously exceptionally difficult to build. In particular, there appears to be a noticeable gap in related web standards and a bunch of resulting inter-browser or platform compatibility issues.

For investigating potential candidates for my note-taking app, I expanded an, especially nice-looking block editor I found on GitHub with a math block functionality.

For that, I used KaTeX and added useful auto-formatting and a math editing UI to the editor.