node-js-api-response-ts/src/ApiError.ts

Unified API response and error handling for Express.js in TypeScript. This package provides a middleware for consistent API responses and error handling in Express applications, making it easier to manage API responses and errors in a standardized way.

import { NextFunction } from 'express';

export class ApiError extends Error {
    public statusCode: number;
    public status: boolean; 

    constructor(statusCode: number, message = 'Internal server error') {
        super(typeof message === 'string' ? message : JSON.stringify(message));
        this.statusCode = statusCode;
        this.status = false;
        this.name = this.constructor.name;
        // Maintains proper stack trace (only needed in V8 environments)
        if (Error.captureStackTrace) {
            Error.captureStackTrace(this, this.constructor);
        }
    }
}


export const ErrorResponse = ( statusCode: number, message: string, next: NextFunction ) => {
    const error = new ApiError(statusCode, message);
    if (typeof next === 'function') {
        next(error);
    } else {
        throw error;
    }
};