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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
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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
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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
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December 2025 update #2

December 30, 2025

New lessons:

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December 2025 update #1

December 22, 2025

Added comments section to lessons.

New lessons:

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Release

December 16, 2025

Course platform is released.

New lessons:

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