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Mastering TypeScript

Introduction to Classes

Learn the fundamentals of TypeScript classes, including property and method declaration, as well as utilizing the this keyword to access class properties.

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Classes in TypeScript

A class is the definition of an object, what data it holds, and what operations it can perform. Classes and interfaces form the cornerstone of object-oriented programming.

Let’s take a look at a simple class definition in TypeScript as follows:

index.ts
tsconfig.json
// Defining a class named SimpleClass
class SimpleClass {
  // Property named "id" with type number
  id: number;
  // Method named "print" with return type void
  print(): void {
    console.log(`SimpleClass.print() called.`);
  }
}
Defining a simple TypeScript class

Here, we define a class using the class keyword, which is named SimpleClass, and has an id property of type number and a print function, which logs a message to the console.

Notice anything wrong with this code? Well, the compiler generates an error message. ...

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