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The lingua franca. Build whatever, run it in the editor. On Libre Academy you learn JavaScript for free by writing real code in an in-editor workbench, graded by hidden tests — runs in your browser. No paywall, no sign-up.

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JavaScript courses

• JavaScript for Beginners — JavaScript · 38 lessons
• Mastering Bitcoin — JavaScript · 87 lessons
• Mastering Ethereum — JavaScript · 133 lessons
• Javascript Challenges — JavaScript · 47 lessons
• Crafting Interpreters (JavaScript) — JavaScript · 30 lessons
• Eloquent JavaScript — JavaScript · 33 lessons
• Exercism JavaScript Track — JavaScript · 158 lessons
• Functional-Light JavaScript — JavaScript · 23 lessons
• The Modern JavaScript Tutorial — Fundamentals — JavaScript · 31 lessons
• JavaScript Koans — JavaScript · 8 lessons
• Mastering Lightning Network — JavaScript · 18 lessons
• Pro Git — JavaScript · 12 lessons
• Testing JavaScript — JavaScript · 51 lessons
• You Don't Know JS Yet — JavaScript · 25 lessons
• Learning React Native — JavaScript · 164 lessons