export class StatusError extends Error { public statusCode: number; public statusMessage?: string; public isClientError: boolean; constructor(message: string, statusCode: number, statusMessage?: string) { super(message); this.name = 'StatusError'; this.statusCode = statusCode; this.statusMessage = statusMessage; this.isClientError = typeof this.statusCode === 'number' && this.statusCode >= 400 && this.statusCode < 500; } }