Javascript get method (When and how to use it)

get method is used in javascript objects both plain and class based when the function doesn’t take any arguments, just a return value

Plain JS object

const user = {
  firstName: 'Vinodh',
  lastName: 'Thangavel',
  get fullName() {
    return this.firstName + ' ' + this.lastName;
  },
};

console.log(user.fullName); // Vinodh Thangavel

get keyword is added to the function name,

user.fullName the getter function is called as a property,

Class

class User {
  constructor(private firstName, private lastName) {}
  get fullName() {
    return this.firstName + ' ' + this.lastName;
  }
}
const user = new User('Vinodh', 'Thangavel');
console.log(user.fullName); // Vinodh Thangavel

Only the syntax is the difference, but the functionalities remains the same.

Violations

• We should not call it as user.fullName() — Error: user.fullName is not a function
• We cannot add arguments to the function, as we cannot send arguments while accessing, if arguments are added, it will be a violation.
• get fullName(arg1) — Error: Getter must not have any formal parameters.