JavaScript
Jun 29, 2025 · Frontend Development
How to Stop Duplicate Uploads: UI Locks, Logic Flags, and Best Practices
This article explains why repeatedly clicking an upload button can cause duplicate requests, UI confusion, and data errors, and presents three robust solutions—disabling the button, using a state flag, and why debounce or throttle are unsuitable—plus essential backend safeguards.
DebounceJavaScriptUpload
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