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関数メンバについて

More than 5 years have passed since last update.
public showMessage(): void {
  alert(this.message);
}

voidは戻り値の型

インターフェース

interface IEngine {
  maxSpeed: number;
  move(speed: number): { message: string; }; //関数メンバ
}

上記関数メンバの型注釈は、オブジェクトリテラル(string型のmessageメンバを持つオブジェクトを返す
関数

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