2. Basics of JavaScript

a. Console

• Using console.log, console.error, console.warn.
• Other methods: console.table, console.time, console.group.

b. Data Types

• Primitive Types: String, Number, Boolean, Undefined, Null, Symbol, BigInt.
• Reference Types: Objects, Arrays, Functions.
• Type Checking: typeof and instanceof.

c. Variables

• Declaring Variables with var, let, and const.
• Scope: Global, Local, and Block.
• Hoisting: Differences between var, let, and const.

3. Operators

• Arithmetic Operators: +, -, *, /, %.
• Comparison Operators: ==, ===, !=, !==, >, <, >=, <=.
• Logical Operators: &&, ||, !.
• Assignment Operators: =, +=, -=, etc.
• Ternary Operator: condition ? expr1 : expr2.

4. Control Structures

• Conditional Statements: if, else if, else, switch.
• Loops:
  • for, while, do-while.
  • Loop Control: break, continue.

5. Functions

• Function Declaration and Invocation.
• Function Expressions.
• Arrow Functions (=>).
• Default and Rest Parameters.
• Returning Values.
• Scope and Closures.

6. Working with Arrays

• Creating Arrays.
• Accessing and Modifying Elements.
• Array Methods: push, pop, shift, unshift, splice, slice.
• Iteration: forEach, map, filter, reduce, find, findIndex.

7. Strings

• String Methods: concat, includes, slice, substring, toUpperCase, toLowerCase.

8. Objects

• Creating and Accessing Objects.
• Adding, Updating, and Deleting Properties.
• Object Destructuring.
• Spread and Rest Operators (...).
• Object Methods and this.

9. Asynchronous JavaScript

• Callbacks:
• Handling Asynchronous Code.
• Promises:
• Creating and Consuming Promises.
• async and await.
• Event Loop and Microtasks.

10. Error Handling

• try-catch and finally.
• Custom Errors with throw.
• Debugging with Browser DevTools.

11. Object-Oriented Programming (OOP)

• Classes and Constructors.
• Inheritance using extends and super.
• Encapsulation: Public and Private Properties.
• Prototypes and Prototype Chain.

12. Advanced JavaScript

• ES6+ Features:
• Template Literals, Default Parameters.
• Destructuring, Spread, and Rest.
• Modules (import, export).
• Symbols and Iterators.
• Generators.

13. Working with APIs

• Fetching Data using fetch.
• Parsing JSON Data.
• Handling Errors in API Calls.
• CRUD Operations with REST APIs.

14. Browser Storage

• Local Storage.
• Session Storage.
• Cookies.

15. Regular Expressions

• Basics: patterns, flags.
• Using : test, match, replace, search, split.

16. Performance Optimization

• Debouncing and Throttling.
• Memory Leaks and Garbage Collection.

17. Advanced Topics

• Web Workers.
• Service Workers and Progressive Web Apps (PWAs).
• WebSockets.
• IndexedDB.