Anemic Model in TypeScript with Object Validation

UserAnemicModel.ts

class User {
  private _name: string;
  constructor() {}

  set name(name: string) {
    this._name = name;
  }

  get name(): string {
    return this._name;
  }
}

const user = new User();

// ... later on the code

 user.name.toUpperCase(); // TypeError: user._name is undefined


class User {
  // name is mandatory is, we will always have a name.
  constructor(private _name: string) {
    if (_name?.length < 2) {
      throw new Error('Name is mandatory');
    }
  }

  get name(): string {
    return this._name;
  }
}

const user = new User('Alex');

user.name.toUpperCase(); // will always work