*JavaScript essentials* every beginner should know in 2025: 1. *Variables & Data Types*: Learn about `let`, `const`, and `var`, plus types like string, number, boolean, array, and object. 2. *Operators & Expressions*: Get comfortable with arithmetic, comparison, logical, and assignment operators. 3. *Functions*: Understand function declarations, expressions, arrow functions, and concepts like closure and hoisting. 4. *Control Structures*: Use `if`, `else`, `switch`, loops (`for`, `while`, `forEach`) to control program flow. 5. *ES6 Features*: Master arrow functions, template literals, destructuring, spread/rest operators, and modules for modern code. 6. *DOM Manipulation*: Learn how JavaScript interacts with HTML using the DOM—select elements, change content/styles, and handle events. 7. *Objects & Arrays*: Work with objects and arrays, including methods for adding, removing, and updating data. 8. *Asynchronous JS*: Handle async code with callbacks, promises, and `async/await`. 9. *Debugging*: Use browser dev tools to debug and test your code. *React ❤️ for more*