Setting up a property using a setter within the constructor: Is it possible?

Working with the Angular framework and this is my current class structure:

export class Demo {
  _name: string;

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

  public set name(inputName: string) {
    this._name = `%${inputName}%`;
  }

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

Encountering an error message:

Property '_name' has no initializer and is not definitely assigned in the constructor.

Seeking advice on how to resolve this issue?

Answer №1

There are a variety of choices available

Option 1:

Utilize ! to indicate to TypeScript's Strict Class Initialization that it's acceptable not to initialize _name

_name!: string;
  // ^
  // Observe this '!' modifier.
  // This is the "definite assignment assertion"

Option 2:

Assign _name in the constructor accurately

  constructor(inputName: string) {
    this._name = inputName; // _name, not name
  }

Option 3:

Set an initial value for _name as a default string. This guarantees that _name will always be a string. If left unset, _name can be undefined.

_name: string = '';

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