JavaScript Loops & Hoisting Explained — for, for…of, for…in скачать в хорошем качестве

JavaScript Loops & Hoisting Explained — for, for…of, for…in

🚀 JavaScript Loops & Hoisting Explained — for, for…of, for…in (Beginner → Interview Level) In this video, we break down some of the most fundamental JavaScript concepts every developer must understand — the different types of loops and the concept of hoisting. You’ll learn how the classic *for loop* gives full control over iteration using indexes, making it ideal for performance-heavy logic and custom traversal. We then explore **for…of**, the modern approach designed to iterate over values from iterable structures like arrays, strings, maps, and sets, making code cleaner and easier to read. Next, we cover **for…in**, which focuses on object property keys and is commonly used when working with objects and dynamic data structures. You’ll also understand why using for…in with arrays can sometimes lead to unexpected results. The video also dives into **hoisting**, one of the most important behind-the-scenes behaviors of JavaScript. You’ll understand how the JavaScript engine processes declarations before execution, the difference between var, let, and const hoisting, the concept of the Temporal Dead Zone, and how function declarations behave differently from function expressions. Hoisting is the behavior where declarations are moved to the top of their scope during compilation phase before execution. Only declarations are hoisted, not initializations. By the end, you’ll clearly know when to use each loop, how JavaScript prepares code before running it, and how these concepts connect to scope, closures, and real-world application development. Perfect for beginners, interview preparation, and developers who want a deeper mental model of how JavaScript actually works. #JavaScript #WebDevelopment #Frontend #Programming #JSConcepts #Hoisting #ForLoop #CodingInterview #React #NodeJS