Multer file upload example how to#

At the end of this blog, you will be able to integrate the file uploads in your own apps.

The goal is to make you comfortable in building apps that can easily handle any file uploads.

Multer file upload example how to#

The code is similar to single file upload, except we accept a field photos instead of avatar, limit the total file to 12, accept an array of files as input, and reply result as array. In this tutorial, we are going to learn how to upload files on the server with the help of Multer and Express in Node.js. To know more about TypeScript configuration, visit the documentation. TypeScript ConfigurationДЄdd a TypeScript configuration file. Since we are using Typescript, we need to install files in order to have auto-complete function (IntelliSense) during development.ДЄ couple of setup steps to go before we start. MULTER middleware upload file Upload Image Middleware MULTER 2.Html Transport files in the Form form must join ENCTYPE Multipart / Formdata Example Package.

loki: LokiJS, a fast, in-memory document-oriented datastore for node.js, browser and cordova.

multer: Node.js middleware for handling multipart/form-data.

cors: A node.js package that provides an Express/Connect middleware to enable Cross Origin Resource Sharing (CORS).

express: We will develop our API using ExpressJs.

So you can follow the below step for node js multer file upload example.

npm install express cors multer lokijs del -save A multer is one type of npm package and it is a Node.js middleware for handling files.

yarn add express cors multer lokijs del.

Run this command to install required dependencies We will be using Typescript throughout this tutorial. The complete source code is available here. We will go through step-by-step on how to handle single and multiple files upload with Express, save it to the database (LokiJS), and retrieve the saved file for viewing.

After configuration, the accepted files will be written directly to the disk as temporary files. The most commonly used is dest, which represents the disk address of the file cache. The configuration is passed in as an object. File upload is a common feature that almost every website needs. upload is a multer object generated according to the configuration, which is used in subsequent request processing.