JavaScript Resources

Official Documentation

• ECMAScript Language Specification
• MDN JavaScript Documentation
• MDN Web APIs Documentation

Learning Resources

• JavaScript.info - Modern JavaScript Tutorial
• Eloquent JavaScript (free online book)
• You Don't Know JS (book series)
• Exploring JS (Dr. Axel Rauschmayer)

Practice and Tools

• CodePen - Online Code Editor
• JSFiddle - Code Playground
• CodeSandbox - Online IDE
• Exercism JavaScript Track

Community

• Stack Overflow - JavaScript
• DEV Community - JavaScript
• Hacker News