public

Learn public members with the public modifier.

What is public?

public indicates that a member is accessible from anywhere. It can be accessed from outside the class and even from other files. In TypeScript, if no modifier is written, the default is public; but writing it explicitly makes the code more readable.

class User {
  public name: string;
  constructor(name: string) {
    this.name = name;
  }
}
const u = new User("Ada");
console.log(u.name);

Default public

If you do not write any modifier, TypeScript treats the member as public by default. So name: string and public name: string have the same access; both are accessible from outside.

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

Exercise User class with a public field

Define a User class with a public name: string field. Add a constructor that takes name and assigns it with this. Create a new User("Ada") and print the name field.

Show example solution

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

const u = new User("Ada");
console.log(u.name);

Test yourself

What is the default access if no modifier is written?
- private
- protected
- static
- public
Show answer

public — In TypeScript, when no modifier is written, the default is public. The member is accessible everywhere. private and protected must be written explicitly; static is not an access modifier but a class-level modifier.

Complete the public modifier

class User {
  ____ name: string;
}

Show answer

class User {
  public name: string;
}

public parts

public

Accessible everywhere
name: string (belirteç yok)

Default public
u.name

External access
public greet()

Public method

Next lesson: private

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