setter and getter in javascript class code example

Example 1: javascript class getter setter

// *** JS Class GETTER / SETTER (+split)

	class Person {
        constructor(firstname, lastname) {
            this.firstname = firstname;
            this.lastname = lastname;
        }
        // getters => access properties
        // setters => change or mutate them
        get fullName() {
            return `Hello ${this.firstname} ${this.lastname}`;
        }
        set fullName(space) {
            const parts = space.split(' ');
            this.firstname = parts[0];
            this.lastname = parts[1];
        }
    }
    let run = document.getElementById("run");
    run.addEventListener('click', () => {
        let john = new Person('John', 'Connor');
        console.log(john.fullName);
        john.fullName = 'Billy Butcher';
        console.log(john.firstname + ' ' + john.lastname);
      	//console.log(`${john.firstname} ${john.lastname}`); same output
      // => has to be john.firstname otherwise undefined 
    }) 
// output => Hello John Connor | Billy Butcher

Example 2: getters and setters javascript classes

// ES6 get and set
class Person {
  constructor(name) {
    this._name = name;
  }

  get name() {
    return this._name.toUpperCase();
  }

  set name(newName) {
    this._name = newName; // validation could be checked here such as only allowing non numerical values
  }

  walk() {
    console.log(this._name + ' is walking.');
  }
}

let bob = new Person('Bob');
console.log(bob.name); // Outputs 'BOB'

Example 3: getter and setters in js

var person={firstname:"chetha",secondname="kumar",get fullname()
{
  	return this.firstname+" "+this.secondname;
}
document.write(person.fullname);
var person={firstname:"chethan",secondname="kumar",course:"",set course(x)
{
  	this.course=x;
}
person.course="bca";
document.write(person.course);