FormData
FormData is a web API interface that provides a way to easily construct a set of key/value pairs representing form fields and their values, which can be sent using the fetch() or XMLHttpRequest APIs. It is primarily used to handle form data in web applications, especially for file uploads and multipart/form-data submissions. The interface allows developers to programmatically append data, including files, without manually encoding it.
Developers should use FormData when building web forms that require file uploads, need to send data as multipart/form-data, or want to simplify the process of sending form data via AJAX/fetch requests. It is essential for modern web applications that handle user-generated content, such as image uploads in social media apps or document submissions in enterprise systems, as it seamlessly integrates with the Fetch API and supports binary data.