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Learn JavaScript Fundamentals in JavaScript

Study JavaScript Fundamentals with focused JavaScript lessons from Learn JavaScript Online. This topic hub collects 18 lessons in the The JavaScript language section.

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Lessons in this JavaScript topic

  1. 2.1Hello, world!
  2. 2.2Code structure
  3. 2.3The modern mode, "use strict"
  4. 2.4Variables
  5. 2.5Data types
  6. 2.6Interaction: alert, prompt, confirm
  7. 2.7Type Conversions
  8. 2.8Basic operators, maths
  9. 2.9Comparisons
  10. 2.10Conditional branching: if, '?'
  11. 2.11Logical operators
  12. 2.12Nullish coalescing operator '??'
  13. 2.13Loops: while and for
  14. 2.14The "switch" statement
  15. 2.15Functions
  16. 2.16Function expressions
  17. 2.17Arrow functions, the basics
  18. 2.18JavaScript specials