Embedded Files
Way to go! Let’s review what you learned.
Classes are templates for objects.
Javascript calls a constructor method when we create a new instance of a class.
Inheritance is when we create a parent class with properties and methods that we can extend to child classes.
We use the extends keyword to create a subclass.
The super keyword calls the constructor() of a parent class.
Static methods are called on the class, but not on instances of the class.
In completing this lesson, you’ve taken one step closer to writing efficient, production-level JavaScript. Good luck as you continue to develop your skills and move into intermediate-level concepts.
Instructions
Instructions
If you want extra practice with inheritance, take some time to create a Doctor class that inherits from HospitalEmployee. The properties and methods for the Doctor class are listed below:
Doctor
properties: _name, _remainingVacationDays (set to 20 inside constructor()), _insurance
methods: .takeVacationDays()
main.js
main.js
class HospitalEmployee {
constructor(name) {
this._name = name;
this._remainingVacationDays = 20;
}
get name() {
return this._name;
}
get remainingVacationDays() {
return this._remainingVacationDays;
}
takeVacationDays(daysOff) {
this._remainingVacationDays -= daysOff;
}
}
class Nurse extends HospitalEmployee {
constructor(name, certifications) {
super(name);
this._certifications = certifications;
}
get certifications() {
return this._certifications;
}
addCertification(newCertification) {
this.certifications.push(newCertification);
}
}
const nurseOlynyk = new Nurse('Olynyk', ['Trauma','Pediatrics']);
nurseOlynyk.takeVacationDays(5);
console.log(nurseOlynyk.remainingVacationDays);
nurseOlynyk.addCertification('Genetics');
console.log(nurseOlynyk.certifications);
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