Uploading Files in Node.js with Multer

Introduction :

Multer is a middleware for handling multipart/form-data, which is primarily used for uploading files in Node.js. It simplifies the process of handling file uploads by providing an easy-to-use API and integrating seamlessly with Express.js, a popular web framework for Node.js.

Prerequisites:

To follow this tutorial, you should have the following installed on your system:

1. Node.js and npm (Node Package Manager)
2. Express.js
3. Multer

Step 1: Setting Up Your Project:

Create a new directory for your project and navigate into it using your terminal or command prompt.

mkdir multer-file-upload
cd multer-file-upload

Initialize a new Node.js project by running:

npm init -y

Install Express.js and Multer as dependencies:

npm install express multer

Create a new file named app.js and open it in your preferred code editor.

Step 2: Setting Up Express and Multer:

In app.js, set up Express and configure Multer to handle file uploads:

Step 3: Create an HTML Form:

Create an HTML file named index.html in the project root directory:

Step 4: Run the Application:

Start the Node.js server by running:

node app.js

Open your web browser and navigate to http://localhost:3000. You should see a simple form with a file input field. Choose a file and click the “Upload” button to submit the form.

Conclusion:

In this tutorial, you learned how to use Multer to handle file uploads in a Node.js application. Multer simplifies the process of handling multipart/form-data and integrates seamlessly with Express.js. By following the steps outlined in this tutorial, you can easily implement file uploads in your Node.js projects.