Dropzone is a JavaScript library used to create interactive file upload zones with drag-and-drop support. It functions as an HTTP file upload manager that handles network request management and the transmission of files to a server.
The library includes a client-side image previewer that generates thumbnails and resizes files within the browser before they are transmitted. It provides a customizable upload interface through a set of themes and event listeners that modify the visual style and behavior of the upload areas.
The system manages the end-to-end upload process by tracking real-time progress and supporting the transmission of large files. It employs queue-based scheduling to process pending files and provides mechanisms to display upload status via progress bars.
