JavaScript Fundamentals

Build a confident JavaScript foundation with variables, functions, collections, and asynchronous code. Follow the ideas in small steps: first understand the concept, then practice it in the browser, and finally connect it to a realistic coding problem. Each lesson builds on the previous one so the track becomes a skill you can explain and use, not just a list of terms.

180 interactive lessons across 6 units · 36+ hours · beginner level

What you will learn

Build practical skills in JavaScript, Beginner, Programming Basics through browser-based coding exercises, guided feedback, unit quizzes, a debugging challenge, and a final project.

Course access

Unit 1, including its first 30 lessons and unit quiz, is free. The remaining 5 units require a CodeLearning365 Pro subscription.

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JavaScript Fundamentals curriculum

The curriculum progresses from foundations to applied practice and mastery. Representative topics from every unit are listed below.

Unit 1: Foundations

30 lessons covering topics such as Values and Variables, Primitive Types, Conditionals, Functions, Arrays.

  • Values and Variables
  • Primitive Types
  • Conditionals
  • Functions
  • Arrays

Unit 2: Core Concepts

30 lessons covering topics such as Power Up 031: String Methods, Power Up 032: Destructuring, Power Up 033: Spread and Rest, Power Up 034: Map and Filter, Power Up 035: Reduce.

  • Power Up 031: String Methods
  • Power Up 032: Destructuring
  • Power Up 033: Spread and Rest
  • Power Up 034: Map and Filter
  • Power Up 035: Reduce

Unit 3: Building Skills

30 lessons covering topics such as Power Up 061: Values and Variables, Power Up 062: Primitive Types, Power Up 063: Conditionals, Power Up 064: Functions, Power Up 065: Arrays.

  • Power Up 061: Values and Variables
  • Power Up 062: Primitive Types
  • Power Up 063: Conditionals
  • Power Up 064: Functions
  • Power Up 065: Arrays

Unit 4: Applied Practice

30 lessons covering topics such as Power Up 091: String Methods, Power Up 092: Destructuring, Power Up 093: Spread and Rest, Power Up 094: Map and Filter, Power Up 095: Reduce.

  • Power Up 091: String Methods
  • Power Up 092: Destructuring
  • Power Up 093: Spread and Rest
  • Power Up 094: Map and Filter
  • Power Up 095: Reduce

Unit 5: Projects

30 lessons covering topics such as Power Up 121: Values and Variables, Power Up 122: Primitive Types, Power Up 123: Conditionals, Power Up 124: Functions, Power Up 125: Arrays.

  • Power Up 121: Values and Variables
  • Power Up 122: Primitive Types
  • Power Up 123: Conditionals
  • Power Up 124: Functions
  • Power Up 125: Arrays

Unit 6: Mastery

30 lessons covering topics such as Power Up 151: String Methods, Power Up 152: Destructuring, Power Up 153: Spread and Rest, Power Up 154: Map and Filter, Power Up 155: Reduce.

  • Power Up 151: String Methods
  • Power Up 152: Destructuring
  • Power Up 153: Spread and Rest
  • Power Up 154: Map and Filter
  • Power Up 155: Reduce

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