LWCIntermediatefilesupload
Build LWC file upload with lightning-file-upload
Real World Scenario
Case attachment upload must enforce 10MB limit and virus scan trigger.
Expected Answer
• lightning-file-upload record-id linked uploads
• accept attribute restricting file types
• Client size check before upload
• onuploadfinished handler triggering Apex scan queue
• Error toast on upload failure with retry
• Guest user upload permission verification
Follow-Up Questions & Answers
Click to expand — each follow-up includes a direct, interview-ready answer
Direct answer: lightning-file-upload record-id linked uploads Also consider: accept attribute restricting file types In practice: Client size check before upload Balance speed of delivery with maintainability.
Architect Perspective
File upload is async—handle finished event not assume immediate availability.