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Javascript Challenges

Learn JavaScript for free by writing real code, graded by hidden tests.

• JavaScript
• 47 lessons
• ~9 hours
• Free

Learn JavaScript for free on Libre Academy with the Javascript Challenges challenge pack: 47 interactive lessons you complete by writing real code in a built-in editor, graded instantly by hidden tests. No paywall, no sign-up — it runs in your browser and the free desktop app.

What you get

• Hands-on lessons with a real editor and instant, test-graded feedback.
• Free and open source — no account required to start.
• Runs in your browser, and offline in the free desktop app.
• JavaScript runs in your browser.

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