streamlit-patterns

Form validation in Streamlit enforces user input constraints before processing. This Skill provides standardized validation patterns that check data types, ranges, and required fields, returning clean error messages when input fails criteria. Apply these patterns to catch invalid entries early and guide users toward correct input.

File upload and download interactions require safety checks and user-friendly flows. This Skill offers patterns for validating file types and sizes, displaying upload progress, and enabling secure downloads. Use these patterns to prevent errors from unsupported files and create predictable file-handling workflows.

Progress indicators provide visual feedback during computations that take time to complete. This Skill supplies UI patterns for progress bars and status messages that update as tasks execute. Implement these patterns so users see activity and receive clear completion signals rather than a frozen interface.

Route protection prevents unauthorized access to specific pages or features. This Skill includes basic authentication patterns that check user credentials before allowing navigation. Apply these guards to control which users reach sensitive data or admin sections within your app.

Data display patterns structure how information appears to users—previews, tables, and formatted output. This Skill provides standardized layouts for showing data clearly and letting users interact with previews before committing actions. Use these patterns to make data readable and actionable in your app interface.

Error handling transforms technical failures into clear user messages. This Skill supplies patterns for catching exceptions, formatting error text, and displaying them prominently without crashing the app. Implement these patterns so users understand what went wrong and how to recover.