Course · Interactive

JavaScript Foundations

A comprehensive, from-zero JavaScript course — variables, control flow, arrays, objects, functions, and modern ES6 patterns — across 30 lessons of live, auto-graded code in your browser.

Who it's for

Complete beginners and anyone wanting to learn JavaScript from scratch — no prior coding required.

What you'll learn

  • Declare variables and work with strings, numbers, and booleans
  • Control flow with conditionals, loops, and logical operators
  • Use arrays and their methods — map, filter, reduce, and iteration
  • Build and manipulate objects, including methods and destructuring
  • Write functions — declarations, arrow functions, scope, and closures
  • Apply modern ES6+ patterns — spread, template literals, and JSON

Course contents

  1. 01Getting Started — variables, types, strings
  2. 02Control Flow — conditionals, loops, logical operators
  3. 03Arrays — methods, iteration, map/filter/reduce
  4. 04Objects — properties, methods, destructuring
  5. 05Functions — declarations, arrows, scope, closures
  6. 06Modern JavaScript — ES6 patterns, spread, JSON
  7. 07Practice — mixed challenges