🔥 *JavaScript Core Concepts Cheatsheet* ✅ 📌 *1. Variables & Data Types* - `let`, `const`, and `var` - Data types: Number, String, Boolean, Null, Undefined, Symbol, Object 📌 *2. Functions* - Function declaration vs expression - Arrow functions `()=>{}` - Closures & lexical scope 📌 *3. Objects & Arrays* - Creating, accessing, and modifying - Methods like `push()`, `pop()`, `map()`, `filter()` 📌 *4. Control Flow* - `if-else`, `switch` statements - Loops: `for`, `while`, `forEach` 📌 *5. ES6+ Features* - Template literals `` `${var}` `` - Destructuring, Spread & Rest operators - Promises & async/await - Modules (import/export) 📌 *6. DOM Manipulation* - Selecting elements (`getElementById`, `querySelector`) - Event listeners (`addEventListener`) - Changing element properties/styles 📌 *7. Error Handling* - `try-catch-finally` - Throwing errors 📌 *8. JSON & APIs* - JSON.parse() & JSON.stringify() - Fetch API for HTTP requests 💡 *Practice:* Build small projects like to-do list or fetch data from APIs! ✅ *React ❤️ for more*