Скачать или смотреть Why Isn't JavaScript Const Truly Immutable For Objects? - JavaScript Toolkit

Why Isn't JavaScript Const Truly Immutable For Objects? Have you ever wondered why declaring an object with const in JavaScript doesn’t make it completely unchangeable? In this informative video, we’ll explain everything you need to know about how const works with objects in JavaScript. We’ll start by clarifying what the const keyword does when used with objects and why it only protects the reference, not the actual data inside. We’ll discuss how you can modify the contents of an object declared with const, such as changing properties, adding new ones, or deleting existing ones. You’ll learn about methods like Object.freeze, Object.seal, and Object.preventExtensions that give you more control over object mutability. We’ll also explain how these tools work, including their limitations, such as how Object.freeze only affects the first level of an object and nested objects remain mutable unless frozen too. Whether you're managing data in web applications or working on JavaScript projects, understanding these concepts is essential for writing predictable and secure code. If you want to ensure your objects stay unchanged, this video will show you the extra steps needed beyond just using const. Join us to master object immutability in JavaScript and subscribe for more practical programming tips!

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About Us: Welcome to JavaScript Toolkit, your go-to channel for mastering JavaScript and its essential concepts for web development. Whether you're just starting or looking to sharpen your skills, we cover everything from JavaScript basics, DOM manipulation, variables and data types, to loops and conditionals. Learn about JavaScript functions, event listeners, arrays, objects, and the new features introduced in ES6, including async/await and promises. Our friendly approach makes complex topics accessible and engaging for everyone.