File Upload
File upload covers choosing, checking, sending, and managing files from a device.
A real example
An image drop area shows a preview and rejects files that are too large. People can retry or remove them.
Main parts
- 01Persistent label
- 02Input control
- 03Hint or format
- 04Validation message
Use it when
Use it to send a document, picture, video, or other device file.
Do not use it when
Never accept a file before explaining allowed types, size limits, privacy, and upload progress.
Name used in code
<input type="file"> Before you ship
Give each field a label that code can read. Link hints and errors, and keep entered values. Check autofill, keyboard order, validation timing, submit states, failure recovery, zoom, and languages.
Outcome: Use File Upload to solve this user need without losing the current context. User context: An image drop area shows a preview and rejects files that are too large. People can retry or remove them. Recommended pattern: File Upload. Why it fits: Use it to send a document, picture, video, or other device file. Do not use it when: Never accept a file before explaining allowed types, size limits, privacy, and upload progress. Product requirements: Define the default, loading, empty, error, success, and recovery states. Keep user input. Give clear feedback after every action. Accessibility and resilience: Use semantic HTML, full keyboard access, and visible focus. Make the layout work when zoomed and support reduced motion. Follow the project’s current rules. Do not add a new UI library unless the project already uses it. Acceptance criteria: The main task works with keyboard only and at 320px width. Focus and status changes are announced. Check loading, failure, retry, cancel, and reduced-motion paths. Evidence and limits (evidence boundary): No single official standard controls the whole term. Its meaning may change across teams, platforms, or frameworks. Unknowns to confirm: Product wording, data source, analytics events, supported devices and languages, and platform limits.
Check this request
Review the current use of File Upload. Definition: File upload covers choosing, checking, sending, and managing files from a device. Release checks: Give each field a label that code can read. Link hints and errors, and keep entered values. Check autofill, keyboard order, validation timing, submit states, failure recovery, zoom, and languages. Before changing code, report the evidence you found, gaps, severity, and the smallest safe fix.