basic-class-with-destructuring-default-params.js

class Person {
  constructor({ firstName = 'John', lastName = 'Doe' }) {
    this.firstName = firstName;
    this.lastName = lastName;
  }

  getFullName() {
    return this.firstName + ' ' + this.lastName;
  }
}

console.log(new Person({}).getFullName());         // John Doe
console.log(new Person({ lastName: 'Smith' }).getFullName());  // John Smith