Object visor in JavaScript refers to the process of controlling the visibility of object properties and methods. When you create an object in JavaScript, you can define its properties and methods using various visibility modifiers such as public, private, and protected. These modifiers determine how the properties and methods can be accessed and manipulated within the object and from outside the object. Understanding object visor is crucial for writing efficient and secure JavaScript code. By using object visor, you can encapsulate the internal state of an object and expose only the necessary properties and methods to the outside world. This helps in preventing unauthorized access and manipulation of the object's data and behavior. In JavaScript, object visor can be implemented using various techniques such as closures, ES6 classes, and modules. By applying these techniques, you can achieve encapsulation and abstraction in your JavaScript code, making it more maintainable and robust. Additionally, understanding object visor allows you to create reusable and modular code by defining clear boundaries for the visibility and accessibility of object properties and methods. This promotes code reusability and reduces the risk of unintended side effects when working with objects in JavaScript. Object visor also plays a key role in object-oriented programming principles such as encapsulation, inheritance, and polymorphism. It enables you to create well-defined objects with clear interfaces, making it easier to collaborate with other developers and integrate your objects into larger applications. Overall, object visor in JavaScript is a fundamental concept that influences the design and implementation of objects in your code. By mastering object visor, you can write more secure, maintainable, and scalable JavaScript applications.