Public by default

Public by default

In our examples, we’ve been able to freely access the members that we declared throughout our programs. If you’re familiar with classes in other languages, you may have noticed in the above examples we haven’t had to use the word public to accomplish this; for instance, C# requires that each member be explicitly labeled public to be visible. In TypeScript, each member is public by default.

You may still mark a member public explicitly. We could have written the Animal class from the previous section in the following way:

class Animal {
  public name: string;
  public constructor(theName: string) { this.name = theName; }
  public move(distanceInMeters: number) {
    console.log(`${this.name} moved ${distanceInMeters}m.`);
  }
}