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Coddy

Learn JavaScript

via Coddy

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Overview

A free, interactive online JavaScript course. You write JS on every lesson, with AI hints when you get stuck and a certificate when you finish.

  • Use modern JavaScript syntax: let/const, arrow functions, destructuring
  • Manipulate the DOM and respond to events in real browser code
  • Work with arrays, objects, and higher-order functions like map/filter/reduce
  • Handle async flows with Promises and async/await

Syllabus

Fundamentals

  • Introduction
  • Variables
  • Operators Part 1
  • Operators Part 2
  • Decision Making
  • Basic IO
  • Bill Split Calculator
  • Loops
  • Functions
  • FizzBuzz with a Twist
  • Arrays Part 1
  • Arrays Part 2
  • Grocery List Tracker
  • Final Challenges

Logic & Flow

  • Strings In Depth
  • Multi-dimensional Arrays
  • JSON Part 1
  • JSON Part 2
  • Sets Part 1
  • Sets Part 2
  • Library Management System
  • Arrays Interesting Topics
  • Advanced Array methods
  • Manage Festival System

Introduction To TypeScript

  • Getting Started with TS
  • Core Types
  • Data Structure: Arrays & Tuple
  • Working with Functions
  • Types: Aliases, Unions & Inter
  • Typing Objects and Interfaces
  • Project: A Simple Task List
  • Enums
  • Generics: A First Look
  • Project: Inventory Management
  • Advanced Topics

Object Oriented Programming

  • Objects & The this Keyword
  • Organizing Code
  • Classes & Objects
  • Methods & Managing State
  • Encapsulation & Access
  • Project: A Simple Bank Account
  • Inheritance & The extends Key
  • Organizing OOP Code
  • Static Methods & Properties
  • Polymorphism
  • Project: A Shape Renderer
  • Getters & Setters
  • Composition vs. Inheritance
  • Library Management System
  • Final Challenges

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