Complete List of JavaScript Topics

1. Basics

• Introduction to JavaScript
• Embedding JavaScript in HTML
• JavaScript syntax and comments
• Variables (var, let, const)
• Data types (Number, String, Boolean, Null, Undefined, Symbol, BigInt)
• Operators (arithmetic, assignment, comparison, logical, bitwise, ternary)
• Expressions and statements
• Type conversion and coercion

2. Control Flow

• Conditional statements (if, else, else if, switch)
• Loops (for, while, do...while, for...in, for...of)
• break and continue
• Exception handling (try, catch, finally, throw)

3. Functions

• Function declarations and expressions
• Arrow functions
• Function parameters and default values
• Rest parameters and spread operator
• Closures
• Callback functions
• Immediately Invoked Function Expressions (IIFE)
• Function scope and block scope
• Recursion
• Higher-order functions

4. Objects

• Object literals and properties
• Accessing and modifying properties
• Methods in objects
• this keyword and context
• Object prototypes and inheritance
• Object.create()
• Property descriptors and property attributes
• Getters and setters
• ES6 Classes and inheritance
• Static methods and properties
• Symbols as keys
• Object.assign(), Object.keys(), Object.values(), Object.entries()

5. Arrays

• Creating arrays
• Accessing and modifying elements
• Array methods (push, pop, shift, unshift, splice, slice, concat, indexOf, includes, find, filter, map, reduce, forEach, sort, reverse)
• Multidimensional arrays
• Typed arrays
• Iterators and generators

6. Strings

• String literals and concatenation
• String methods (length, indexOf, includes, startsWith, endsWith, slice, substring, substr, replace, toUpperCase, toLowerCase, trim, split)
• Template literals and string interpolation

7. Numbers and Math

• Number methods and properties (toFixed, toString, parseInt, parseFloat)
• Math object and methods (Math.random(), Math.floor(), Math.ceil(), Math.round(), Math.max(), Math.min(), Math.pow(), Math.sqrt())

8. Date and Time

• Date object creation
• Date methods (getDate, getMonth, getFullYear, getHours, getMinutes, setDate, setMonth, etc.)
• Working with timestamps
• Formatting dates

9. DOM Manipulation

• Document Object Model (DOM) basics
• Selecting elements (getElementById, getElementsByClassName, querySelector, querySelectorAll)
• Modifying element content and attributes
• Creating, inserting, removing elements (createElement, appendChild, removeChild)
• Event handling and event listeners
• Event propagation (bubbling and capturing)
• Form validation and input handling
• Styling elements dynamically (CSS manipulation)
• Working with classes (classList)

10. Events

• Common events (click, load, mouseover, keypress, submit, etc.)
• Event object properties and methods
• Event delegation
• Custom events

11. Asynchronous JavaScript

• Callbacks
• Promises (then, catch, finally)
• Async/Await syntax
• Fetch API and AJAX calls (XMLHttpRequest)
• Error handling in async code
• Event loop and concurrency model

12. Modules

• ES6 modules (import / export)
• Module patterns (CommonJS, AMD)
• Dynamic imports
• Bundlers overview (Webpack, Rollup, Parcel)

13. Error Handling

• Types of errors (syntax, runtime, logical)
• try...catch blocks
• Custom error objects
• Debugging techniques and tools

14. Memory Management

• Garbage collection
• Memory leaks and how to avoid them

15. Browser Storage

• Cookies
• LocalStorage
• SessionStorage
• IndexedDB basics

16. Regular Expressions

• Creating regex patterns
• Common regex methods (test, exec)
• Regex flags
• Using regex for validation and searching

17. Advanced Topics

• Prototypes and prototype chain
• Inheritance patterns
• Symbol and iterators
• Generators and iterables
• Reflect and Proxy objects
• Decorators (experimental)
• Typed Arrays and Binary Data
• WeakMap and WeakSet
• Functional programming concepts (pure functions, immutability)
• Currying and partial application
• Memoization
• Debouncing and throttling

18. JavaScript Engines and Performance

• How JS engines work (V8, SpiderMonkey, Chakra)
• Just-In-Time (JIT) compilation
• Performance optimization tips
• Event loop and microtasks/macrotasks
• Web Workers basics

19. JavaScript and Web APIs

• Browser APIs (Geolocation, Canvas, Web Storage, WebSockets)
• Manipulating CSS variables
• Drag and drop API
• History API
• Intersection Observer API

20. Testing in JavaScript

• Unit testing frameworks (Jest, Mocha, Jasmine)
• Test-driven development (TDD)
• Mocking and spies

21. Security

• XSS (Cross-site scripting)
• CORS (Cross-Origin Resource Sharing)
• Secure coding practices