☄️ Getter

const person = {
  _firstName: 'John',
  _lastName: 'Doe',
  get fullName() {
    if (this._firstName && this._lastName){
      return `${this._firstName} ${this._lastName}`;
    } else {
      return 'Missing a first name or a last name.';
    }
  }
}
 // To call the getter method: 
person.fullName; // 'John Doe'

☄️ Setter

const robot = {
  _model: '1E78V2',
  _energyLevel: 100,
  _numOfSensors: 15,
  get numOfSensors(){
    if(typeof this._numOfSensors === 'number'){
      return this._numOfSensors;
    } else {
      return 'Sensors are currently down.'
    }
  },
  set numOfSensors(num) {
if(typeof num === "number" && num >= 0) {
  return this._numOfSensors = num
} else {
console.log( 'Pass in a number that is greater than or equal to 0')
}
  }
}; 
robot.numOfSensors = 100;
console.log(robot.numOfSensors)

☄️ in a nutshell

getter

setter