JavaScript(JS) object method - defineProperty

In JavaScript, the Object.defineProperty() method is used to define a new property or modify an existing property on an object. This method allows you to control various aspects of a property, such as its value, whether it is writable, enumerable, or configurable.

The syntax for Object.defineProperty() is as follows:

Object.defineProperty(obj, prop, descriptor)

Where obj is the object on which to define the property, prop is the name of the property, and descriptor is an object that describes the property. The descriptor object can contain the following properties:

• value: The value of the property. Defaults to undefined.
• writable: Whether the property can be changed. Defaults to false.
• enumerable: Whether the property can be enumerated. Defaults to false.
• configurable: Whether the property can be deleted or its attributes can be changed. Defaults to false.
• get: A function to get the value of the property.
• set: A function to set the value of the property.

Here's an example of using Object.defineProperty() to define a new property:

const person = {};
Object.defineProperty(person, 'name', {
  value: 'John',
  writable: false,
  enumerable: true,
  configurable: true
});
console.log(person.name); // Output: John

In this example, we define a new property called name on the person object, and we set its value to 'John'. We also set writable to false, which means that the property cannot be changed. Finally, we set enumerable to true, which means that the property can be enumerated.