Property Accessors

Types of of Object properties

• There are two types:
  • data properties
  • accessor properties

Accessor Property

• They are functions that get executed on getting and setting a value
• The following example illustrates accessor for name property:

let obj = {
  get firstName() {
    // getter, executed on getting obj.propName and return value is taken
    console.log('firstName getter called');
    return "John"
  },
 
  set firstName(value) {
    // setter, executed on setting obj.propName = value
    console.log(`firstName setter called with value: ${value}`);
  }
};
 
console.log(obj.firstName);
// firstName getter called
// John
 
obj.firstName = "KK";
// firstName setter called with value: KK
 
console.log(obj.firstName);
// firstName getter called
// John

Accessor Property Descriptors:

• There are 4 descriptors:
  • get: function
  • set: function
  • enumerable: boolean
  • configurable: boolean