This blog post will be a brief introduction to inheritance in classes.
To create an instance of a class, we use the new keyword. If we would like to inherit from a base class, then we can use the extends keyword.
class Person { name; age; constructor(name) { this.name = name; this.age = 33; } getName() { return this.name; } } // creating new instance of a class Person const person = new Person("Parwinder"); console.log(person.getName()); // Parwinder To extend the Person class, let's use extend.
class Person { name; age; constructor(name) { this.name = name; this.age = 33; } getName() { return this.name; } } const person = new Person("Parwinder"); console.log(person.getName()); // Parwinder class Female extends Person { gender; constructor(name) { super(name); this.gender = "Female"; } } const female = new Female("Lauren"); console.log(female.getName()); // Lauren console.log(female instanceof Female); // true console.log(female instanceof Person); // true super keyword allows us to use the parent class constructor. We can also use super to call a method from the parent/base class.
Classes in ES6 support:
- prototypical inheritance,
super- instance and static methods.
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