JavaScript Roadmap

1. Introduction to JavaScript (1-2 weeks)

Topics:

• What is JavaScript?
• Setup environment (browser console, code editors like VSCode)
• Syntax and basics (variables, data types, operators)
• Control flow (if/else, switch, loops)
• Functions (declaration, parameters, return, scope)

2. DOM Manipulation (2-3 weeks)

Topics:

• Document Object Model (DOM) introduction
• Selecting elements (getElementById, querySelector)
• Modifying elements (text, HTML, attributes, CSS)
• Event handling (click, hover, form submission)
• Creating and appending new elements dynamically

3. Advanced JavaScript Concepts (3-4 weeks)

Topics:

• Closures
• Callbacks and Promises
• Async/Await
• Error handling
• this keyword, prototypes, and inheritance
• Hoisting and the event loop

4. JavaScript in the Browser (Web APIs) (2-3 weeks)

Topics:

• Fetch API (AJAX)
• LocalStorage and SessionStorage
• Browser events (scroll, resize, etc.)
• Form validation
• Manipulating cookies
• Using external APIs (JSON, REST)

5. JavaScript ES6+ (Modern JavaScript) (2-3 weeks)

Topics:

• Let, const, and var
• Template literals
• Arrow functions
• Destructuring objects and arrays
• Default parameters
• Spread and rest operators
• Modules and imports

6. Object-Oriented Programming (OOP) (2-3 weeks)

Topics:

• Classes and objects
• Encapsulation, inheritance, polymorphism
• Constructors and super
• getters and setters
• Static methods and properties

7. JavaScript Frameworks (React.js) (4-6 weeks)

Topics:

• Introduction to React.js
• Components and Props
• State and Lifecycle methods
• React Hooks (useState, useEffect, etc.)
• React Router
• State management with Context API or Redux

8. Testing JavaScript (2-3 weeks)

Topics:

• Introduction to unit testing (Jest, Mocha)
• Writing test cases
• Debugging JavaScript
• Using DevTools for debugging

9. Build Tools & Package Managers (2-3 weeks)

Topics:

• Introduction to npm, yarn
• Webpack, Babel
• Module bundling
• Minification and tree-shaking
• Linting (ESLint, Prettier)

10. Advanced Concepts & Performance Optimization (3-4 weeks)

Topics:

• Web Workers
• Memory leaks and garbage collection
• Lazy loading and code splitting
• Debouncing and throttling
• Service Workers (Progressive Web Apps)