LESSON 287 OF 675 · FUNCTIONS & CLASSES

Class Methods in TypeScript

Lesson

TL ; DR:

A method is a function that lives inside a class. Inside the method, this refers to the object it was called on.

Define methods inside the class body — no function keyword needed:

class Dog {
    name: string;

    constructor(name: string) {
        this.name = name;
    }

    bark(): void {
        console.log("Woof! I am " + this.name);
    }
}

Call it on an object with the dot operator: dog.bark();

Full lesson:

So far you've added data to a class with properties set in the constructor. The other half of OOP is behavior — actions an object can perform. That's what methods are for.

Defining a method

Inside a class body, you write methods without the function keyword:

bark(): void {
    console.log("Woof! I am " + this.name);
}

Use this.name to read the property of the current object.

Your task

Add a bark method (return type void) that logs "Woof! I am " followed by this.name.

Woof! I am Rex

STEP 1 OF 2

Guided

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