node.js

How to Generate Barcodes in Node.js Using Express, EJS, and JsBarcode Generating barcodes programmatically is a frequent requirement when building inventory systems, invoicing modules, or shipping portals. While many developers rely on heavy client-side libraries or external APIs, you can easily build a server-side barcode generator using Node.js, Express, EJS, and the Canvas package . In this tutorial, we will walk through a complete implementation of a dynamic barcode web app that accepts user input via a form, generates a barcode image server-side using JsBarcode and canvas , and renders it instantly on an EJS template. Prerequisites & Tech Stack Make sure you have Node.js installed on your system. We will use the following packages: Express : Fast, unopinionated web framework for Node.js. EJS : Embedded JavaScript templating engine. Canvas : To provide a headless HTML5 Canvas implementation in...

When building scalable web applications, querying and filtering large datasets directly from the database is essential. Client-side filtering only works for small lists, but as your database grows, you need server-side search . In this tutorial, we will walk through how to build a dynamic search feature in a Node.js application using Express, EJS, Mongoose, and MongoDB's $regex operator . Prerequisites & Tech Stack Make sure you have Node.js and MongoDB installed on your system. We will use the following packages: Express : Fast web framework for handling HTTP requests. Mongoose : Elegant ODM library for MongoDB and Node.js. EJS : Embedded JavaScript templating engine for rendering dynamic views. Body-Parser / Express Urlencoded : For parsing incoming form and query data. Step 1: Set Up the Project Folder Open your terminal or command prompt and run the following commands to create and enter your project directory: mkdir searching cd searching Next, initialize a new No...

Handling file uploads is a core requirement for many web applications—whether you are building an e-commerce store for product images, a profile picture uploader, or an inventory management system. In this tutorial, we will walk through how to build a complete file upload pipeline from scratch using Node.js, Express, Multer (for handling multipart form data), EJS (for server-side rendering), and Mongoose (to store file paths and metadata in MongoDB). Prerequisites & Tech Stack Make sure you have Node.js and MongoDB installed on your system. We will use the following packages: Express: Fast web framework for handling server routes and requests. EJS: Template engine used to render dynamic HTML views. Body-Parser: Middleware to parse incoming form request bodies. Multer: Middleware specifically designed for handling multipart/form-data file uploads. Mongoose: Object Data Modeling (ODM) library to connect and interact with MongoDB. Step 1: Setup Your Project Directory Open...

How to Implement Form Validation in Node.js and Express Using Express-Validator Handling user input safely is one of the most critical responsibilities of backend development. Accepting unvalidated data can lead to corrupted databases, broken application states, and severe security vulnerabilities like injection attacks. In this tutorial, we will walk through how to build robust form validation in a Node.js application using Express, EJS, Body-Parser, and the express-validator library . Prerequisites & Tech Stack Make sure you have Node.js installed on your system. We will be using the following packages: Express: Fast, unopinionated web framework for building Node.js applications. Body-Parser: Middleware to extract incoming request data and expose it on req.body . Path: Built-in Node.js module for working with file and directory paths. Express-Validator: A set of Express middlewa...