Core understanding of JS syntax and execution

1. What is JavaScript
2. JavaScript vs Java
3. How JavaScript works in browsers
4. Including JavaScript ( <script> tag, External JS file )
5. JavaScript output methods ( console.log(), alert(), document.write() )
6. Variables ( var, let, const )
7. Data types ( Number, String, Boolean, Undefined, Null )
8. Operators ( Arithmetic, Assignment, Comparison, Logical )
9. Comments ( Single line, Multi-line )
10. Type conversion ( Implicit, Explicit )
11. Basic input handling ( prompt() )
12. Keywords & identifiers
13. JavaScript case sensitivity
14. Semicolons & statements

Logic building and reusable code

1. Conditional statements ( if, if else, else if, switch )
2. Loops ( for, while, do while, for...in, for...of )
3. break and continue
4. Functions ( Function declaration, Function expression )
5. Function parameters & arguments
6. Return values
7. Default parameters
8. Arrow functions
9. Scope ( Global, Local, Block )
10. Hoisting (intro)
11. Call stack basics
12. Nested functions
13. Immediately Invoked Function Expressions (IIFE)
14. Recursion basics

Data manipulation mastery (Arrays, Objects )

1. Creating arrays
2. Accessing & modifying elements
3. Array properties ( length )
4. Array methods ( push, pop, shift, unshift, slice, splice, concat, join, sort, reverse )
5. Iteration methods ( forEach, map, filter, reduce, find )
6. Object creation
7. Properties & methods
8. Dot vs bracket notation
9. this keyword
10. Object destructuring
11. Spread operator
12. JSON basics
13. Object.keys()
14. Object.values()
15. Object.entries()

Dynamic web interaction

1. What is DOM
2. DOM tree structure
3. Selecting elements ( getElementById, getElementsByClassName, querySelector, querySelectorAll )
4. Modifying DOM elements ( innerHTML, textContent, style, classList )
5. Creating & removing elements
6. Event handling ( onclick, addEventListener )
7. Event types ( Mouse events, Keyboard events, Form events )
8. Event bubbling & capturing
9. Event delegation
10. Browser objects ( window, document, navigator )
11. Timers ( setTimeout, setInterval )
12. LocalStorage & SessionStorage
13. Cookies (basic)
14. Form validation (JS)

Modern JavaScript & async programming

1. ES6 features overview
2. let vs const vs var
3. Template literals
4. Destructuring ( Array, Object )
5. Destructuring ( Array, Object )
6. Spread & rest operators
7. Enhanced object literals
8. Classes ( Constructor, Methods )
9. Inheritance
10. Modules ( export, import )
11. Promises ( then, catch, finally )
12. Async / Await
13. Callbacks
14. Event loop
15. Microtasks vs macrotasks

Deep internals & best practices

1. JavaScript engine & execution context
2. Call stack & memory heap
3. Scope chain
4. Closures
5. Hoisting (deep)
6. this keyword (advanced)
7. Prototype & prototypal inheritance
8. bind, call, apply
9. Debouncing & throttling
10. Shallow vs deep copy
11. Currying
12. Composition
13. Immutability
14. Functional programming concepts
15. Performance optimization
16. Security basics ( XSS, CSRF overview )
17. Garbage collection
18. Design patterns (intro)
19. Clean code principles