Multer
Multer is a Node.js middleware for handling multipart/form-data, primarily used for uploading files in web applications. It simplifies the process of receiving and storing files from client-side forms, integrating seamlessly with Express.js and other Node.js frameworks. It supports various storage engines, including disk storage and memory storage, and allows for file filtering and size limits.
Developers should learn Multer when building Node.js applications that require file upload functionality, such as image galleries, document management systems, or user profile picture uploads. It is essential for handling multipart/form-data efficiently, as native Node.js handling is complex, and Multer provides a robust, middleware-based solution that integrates well with Express.js routes and error handling.