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Coding Labs
Solve interactive programming challenges, complete chapters, and earn coins redeemable for cash!
HTML Labs
Build a rock-solid HTML foundation — structure, forms, semantics, accessibility, Canvas, and a final portfolio project. Learn by writing code with real-time browser test feedback.
CSS Labs
Master CSS from first principles — box model, flexbox, grid, animations, and custom properties. Write styles and see live results in real-time, right in your browser.
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Master JavaScript from variables to DOM manipulation — write real code, see live console output, and pass function-level tests right in your browser.
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Learn React components, hooks, lifecycle, and patterns by writing code. Run tests in real-time right inside your browser.