File Upload
Uploading files, such as documents or media, is a common requirement in React Native applications. This tutorial explains how to implement file uploads using FormData.
Selecting a File
Files can be selected using libraries such as react-native-document-picker or the device’s image picker for media-specific uploads.
Creating a FormData Object
Uploading with Axios
Tracking Upload Progress
Axios supports an onUploadProgress callback, allowing you to display a progress bar while a large file is being uploaded.
Handling Upload Errors
File uploads can fail due to network interruptions or file size limits, so proper error handling with clear user feedback is essential for a good upload experience.
Uploading Multiple Files
Multiple files can be appended to the same FormData object using an array-style field name, allowing the server to process them together in a single request.
Conclusion
File uploads using FormData, combined with upload progress tracking, provide a robust way to send documents and media from your React Native application to a backend server.
