📚 JavaScript Fundamentals & LeetCode Questions

Welcome to my JavaScript learning journey! This repository contains my notes, code snippets, and solutions to JavaScript fundamentals and LeetCode problems solved using JavaScript.

---

📌 Table of Contents

• 🔰 JavaScript Fundamentals
  • 🧠 Basics
  • 📦 Data Types
  • 📐 Operators
  • 🔁 Control Structures
  • 🧮 Functions
  • 📚 Arrays & Objects
  • 🕳️ Scope & Hoisting
  • 🧵 Asynchronous JS
  • 🌐 DOM Manipulation
  • 🔄 ES6+ Features
• 💡 LeetCode JavaScript Solutions
  • 🟢 Easy
  • 🟡 Medium
  • 🔴 Hard
• 🛠️ How to Use
• ✅ Progress Tracker
• 📌 Resources

---

🔰 JavaScript Fundamentals

All core concepts of JavaScript from beginner to advanced are covered here.

🧠 Basics

• Hello World
• Comments
• Variables (var, let, const)
• Console methods

📦 Data Types

• Primitive: String, Number, Boolean, Null, Undefined, Symbol
• Non-primitive: Objects, Arrays, Functions

📐 Operators

• Arithmetic, Assignment, Comparison, Logical, Ternary, Bitwise

🔁 Control Structures

• if/else, switch
• loops: for, while, do...while
• break & continue

🧮 Functions

• Declaration & Expression
• Arrow Functions
• Callbacks
• IIFE
• Closures

📚 Arrays & Objects

• Methods: map, filter, reduce, forEach, find, etc.
• Destructuring
• Spread & Rest operators

🕳️ Scope & Hoisting

• Global, Local, Block
• Var vs Let vs Const
• Hoisting & Temporal Dead Zone

🧵 Asynchronous JS

• setTimeout & setInterval
• Promises
• Async/Await
• Fetch API

🌐 DOM Manipulation

• Selecting elements
• Events & Listeners
• Modifying HTML/CSS using JS

🔄 ES6+ Features

• Template Literals
• Default Parameters
• Classes
• Modules
• Optional Chaining
• Nullish Coalescing

---

💡 LeetCode JavaScript Solutions

🟢 Easy

#	Title	Solution
1	Two Sum	Link
13	Roman to Integer	Link
58	Length of Last Word	Link

🟡 Medium

#	Title	Solution
3	Longest Substring Without Repeating Characters	Link
46	Permutations	Link

🔴 Hard

#	Title	Solution
10	Regular Expression Matching	Link

---

🛠️ How to Use

1. Clone the repo

   git clone https://github.com/your-username/js-fundamentals-leetcode.git
   cd js-fundamentals-leetcode