06-es6-classes.js

/**
 * ******************************
 * ES6 Classes
 * ******************************
 **/

/**
 * ********************
 * Person class
 * ********************
 **/
class Person {
  constructor(firstName, lastName, dob) {
    this.firstName = firstName;
    this.lastName = lastName;
    this.birthday = new Date(dob);
  }

  greeting() {
    return `Hello there ${this.firstName} ${this.lastName}`;
  }

  calculateAge() {
    const diff = Date.now() - this.birthday.getTime();
    const ageDate = new Date(diff);
    return Math.abs(ageDate.getUTCFullYear() - 1970);
  }

  getsMarried(newLastName) {
    this.lastName = newLastName;
  }

  static addNumbers(x, y) {
    return x + y;
  }
}

/**
 * ********************
 * Create object using a class
 * ********************
 **/
const mary = new Person('Mary', 'Williams', '11-13-1980');
console.log(mary);
mary.getsMarried('Thompson');
console.log(mary.greeting());

// Static Method
console.log(Person.addNumbers(1, 2));