June 2026 update
June 4, 2026
New course:
- React — learn modern React with components, props, and Vite
New lessons in React:
Lessons UI improvements:
- Added an interactive cross-course lesson dependency graph in a collapsible panel, showing how lessons connect across courses
- Added a “Copy as Markdown” button to lessons
- Fixed PlantUML diagram rendering
March 2026 update #2
March 28, 2026
New lessons:
Lessons UI improvements:
- Added table of contents to lessons
- Added heading anchors with index numbers
- Added previous/next navigation between lessons
- Fixed sidebar to stay visible while scrolling
- Added architecture diagrams showing changed files
- Added code conventions component
March 2026 update
March 14, 2026
Lessons UI improvements:
- Refactored code blocks — lessons now use components with syntax highlighting
- Added diff highlighting to visually mark added and removed lines
- Added line marks support for code blocks
- Collapsed import/declaration sections in Java file examples to reduce noise
- Added component to surface code convention tips inline in lessons
December 2025 update #1
December 22, 2025
Added comments section to lessons.
New lessons: