Introduction#

• Modern file upload expectations
• The limitations of traditional file inputs
• How Stimulus enhances the upload experience

Basic Setup for File Uploads#

• Creating the file upload form
• Setting up ActiveStorage in Rails 8
• Basic styling for the upload area

Building a Stimulus Controller for Drag & Drop#

• Controller structure and lifecycle hooks
• Handling drag events (dragover, dragenter, dragleave)
• Processing the drop event

Enhancing the User Experience#

• Visual feedback during drag operations
• Preview generation for different file types
• Validating files before upload

Direct Uploads to Cloud Storage#

• Configuring ActiveStorage for direct uploads
• Setting up progress tracking
• Handling upload success and failure

Progress Indicators and Cancel Functionality#

• Creating a progress UI component
• Updating progress in real-time
• Implementing cancel functionality

Multiple File Upload Handling#

• Managing collections of files
• Batch processing uploads
• Reordering uploaded files

Integration with Image Processing#

• Creating thumbnails and previews
• Handling different image formats
• Image optimization techniques

Advanced Features#

• Chunked uploads for large files
• Resume functionality for interrupted uploads
• Background processing of uploaded files

Security Considerations#

• Validating file types and content
• Scanning for malicious files
• Authorization for upload actions

Testing Upload Functionality#

• Unit tests for the Stimulus controller
• Integration tests for the upload flow
• Testing failure scenarios and recovery

Conclusion#

• Best practices for file uploads
• Performance optimization tips
• Further enhancements to consider

Code Repository#

• Link to the example upload implementation
• Configuration and customization documentation