JavaScript Reflect

Reflect

JavaScript Reflect is an object-oriented API that provides methods for intercepting and modifying language operations. It is a built-in object that provides methods for intercepting and modifying language operations. The Reflect object is used to extend the functionality of the JavaScript language, allowing developers to write more powerful and expressive code.

The Reflect object provides a number of methods that allow developers to modify and intercept language operations. These methods provide a way to access and modify the internal state of an object, as well as to intercept and modify language operations.

The Reflect object has a number of methods that allow developers to access and modify the internal state of an object. These methods include Reflect.get(), Reflect.set(), Reflect.apply(), and Reflect.construct(). Each of these methods can be used to access and modify the internal state of an object.

The Reflect.get() method can be used to access the value of a property on an object. For example, the following code can be used to access the value of the name property on an object:

const person = {
  name: 'John Doe'
};

const name = Reflect.get(person, 'name');

console.log(name); // 'John Doe'

The Reflect.set() method can be used to set the value of a property on an object. For example, the following code can be used to set the value of the name property on an object:

const person = {
  name: 'John Doe'
};

Reflect.set(person, 'name', 'Jane Doe');

console.log(person.name); // 'Jane Doe'

The Reflect.apply() method can be used to call a function with a given this value and arguments. For example, the following code can be used to call the sayHello() function with the object person as the this value and the string 'World' as the argument:

const person = {
  name: 'John Doe',
  sayHello() {
    console.log(`Hello ${this.name}`);
  }
};

Reflect.apply(person.sayHello, person, []);

// Output: Hello John Doe

The Reflect.construct() method can be used to construct a new object from a given constructor and arguments. For example, the following code can be used to construct a new object from the Person constructor and the string 'John Doe' as the argument:

function Person(name) {
  this.name = name;
}

const person = Reflect.construct(Person, ['John Doe']);

console.log(person.name); // 'John Doe'

The Reflect object provides a powerful and expressive way to extend the functionality of the JavaScript language. By using the methods provided by the Reflect object, developers can access and modify the internal state of an object, as well as to intercept and modify language operations.