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JavaScript Courses

31 Free Interactive Courses

Browse every JavaScript course on Coddy. Each course runs in your browser with AI-assisted hints, real exercises, and a certificate on completion.

Beginner Challenges - Practice Basic Concepts

Popular

Put your beginner coding knowledge to test and try to solve this programming challenges, use any language you want, Happy Coding!

certificate icon

Certificate on completion

  • 20
  • 20

Coding Problems

Popular

Put your programming problem solving skills to the test using the exercises with different difficulties in this course. Designed for coders with some prior knowledge of the basic syntax in any programming language.

certificate icon

Certificate on completion

  • 32
  • 31

Coding Problems: Volume 2

Popular

Put your programming problem solving skills to the test using the exercises with different difficulties in this course. Designed for coders with some prior knowledge of the basic syntax in any programming language. This course is an extension of the first Coding Problems

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Certificate on completion

  • 25
  • 24

Stack - Data Structures Series #1

Popular

In this course, you will learn about the Stack data structure, create a Stack from zero using your preferred language, and practice coding challenges with it!

Data Structures
  • 13
  • 6
  • 1

Heaps & Priority Queues - Data Structures Series #7

New

In this course, you will learn about the Heap data structure (the backbone of priority queues), create a MinHeap from zero using your preferred language, and practice coding challenges with it!

Data Structures
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Certificate on completion

  • 14
  • 6
  • 1

Star Pattern Bootcamp

Popular

Put your programming problem solving skills to learn how to print star patterns range from simple to complex, involving different levels of nested loops, conditional statements, and mathematical calculations.

  • 30
  • 28

User Class - OOP Project

Popular

In this project, you will create a User Class and practice your object oriented programming skills in a programming language of your choice!

  • 8
  • 1
  • 2

30 Days of Logic Building in Javascript

Popular

In this course, you will learn consistency and easy-to-medium-level JS questions that will help you practice your JS knowledge.

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Certificate on completion

  • 31

Interview Coding Challenges - X

Are you ready for your next coding interview? Test your knowledge and skills with these challenges and be prepared for your next interview, Happy Coding

Interview Preparation
  • 3
  • 3

Interview Coding Challenges - Pack I

Are you ready for your next coding interview? Test your knowledge and skills with these challenges and be prepared. Good luck!

Interview Preparation
  • 3
  • 3

Binary Tree - Data Structures Series #3

In this course, you will learn about the Binary Tree data structure, create a Binary Tree from zero using your preferred language, and practice coding challenges with it!

Data Structures
  • 13
  • 5
  • 1

Queue - Data Structures Series #2

In this course, you will learn about the Queue data structure, create a Queue from zero using your preferred language, and practice coding challenges with it!

Data Structures
  • 12
  • 5
  • 1

Bubble Sort

Everything About Bubble Sort

  • 11
  • 10

Linked List - Data Structures Series #5

New

In this course, you will learn about the Linked List data structure, create a Linked List from zero using your preferred language, and practice coding challenges with it!

Data Structures
certificate icon

Certificate on completion

  • 14
  • 6
  • 1

Recursion Challenges - Master The Recursive Thinking

Recursion is an important concept in computer science and a very powerful tool in writing algorithms. In this course, you will use recursion to solve challenges from beginner to advanced. In the end, you will ace this topic.

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Certificate on completion

  • 15
  • 15

Hash Tables - Data Structures Series #4

New

In this course, you will learn about the Hash Table data structure, create a Hash Table from zero using your preferred language, and practice coding challenges with it!

Data Structures
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Certificate on completion

  • 14
  • 12

Interview Coding Challenges - Pack VIII

Are you ready for your next coding interview? Test your knowledge and skills with these challenges and be prepared for your next interview, Happy Coding

Interview Preparation
  • 3
  • 3

Interview Coding Challenges - Pack V

Are you ready for your next coding interview? Test your knowledge and skills with these challenges and be prepared, did you finished the last packs? Happy Coding!

Interview Preparation
  • 3
  • 3

Interview Coding Challenges - Pack III

Are you ready for your next coding interview? Test your knowledge and skills with these challenges and be prepared. Good luck!

Interview Preparation
  • 3
  • 3

Interview Coding Challenges - Pack II

Are you ready for your next coding interview? Test your knowledge and skills with these challenges and be prepared. Good luck!

Interview Preparation
  • 3
  • 3

Doubly Linked List - Data Structures Series #6

New

In this course, you will learn about the Doubly Linked List data structure, create a Doubly Linked List from zero using your preferred language, and practice coding challenges with it!

Data Structures
certificate icon

Certificate on completion

  • 14
  • 6
  • 1

Interview Coding Challenges - Pack IX

Are you ready for your next coding interview? Test your knowledge and skills with these challenges and be prepared for your next interview, Happy Coding

Interview Preparation
  • 3
  • 3

Insertion Sort - DSA Series

Simple yet powerful algorithm. Learn how to efficiently arrange elements, understand time complexity, and enhance your sorting skills. Dive in now!

  • 9
  • 3
  • 1

Interview Coding Challenges - Pack VII

Are you ready for your next coding interview? Test your knowledge and skills with these challenges and be prepared for your next interview, Happy Coding

Interview Preparation
  • 3
  • 3

Interview Coding Challenges - Pack IV

Are you ready for your next coding interview? Test your knowledge and skills with these challenges and be prepared, did you finished the last packs? Happy Coding!

Interview Preparation
  • 3
  • 3

Mathematical Riddles

This course will provide ways of thinking and strategies for solving mathematical problems and puzzles using programming.

  • 20
  • 18

Array Methods in JavaScript

In this course, you will learn about Arrays and the most commonly used Array methods in JavaScript and how to use them!

  • 18

Playing Cards Generator (Text Based)

In this course you will create text based playing cards generator using your favorite language, Happy Coding!

  • 6
  • 1
  • 1

Tricky parts of Modern Javascript (ES6+)

In this little course you will learn about the tricky but very important features introduced in Modern Javascript i.e. ES6. Complete this course with your pace to improve your JS knowledge!

  • 9

Interview Coding Challenges - Pack VI

Are you ready for your next coding interview? Test your knowledge and skills with these challenges and be prepared for your next interview, Happy Coding!

Interview Preparation
  • 3
  • 3

Function Declarations in JavaScript

In this course you will learn about different ways of function declaration in JavaScript. From traditional basic function declarations to the modern arrow functions, enhance your coding skills and write cleaner, more efficient JavaScript code!

  • 14

Frequently asked questions

How many JavaScript courses are on Coddy?

Coddy currently has 31 interactive JavaScript courses, covering everything from fundamentals to advanced topics.

Are the JavaScript courses free?

Yes. Every course is free to start, runs in your browser, and ships with AI-assisted hints.

Do I get a JavaScript certificate?

Yes - finish the JavaScript journey and you'll unlock a shareable certificate. See the certifications page for full details.
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