Protected local overwrite entry point
Local Save-Back
Use guarded local save-back only when the browser provides a writable file handle and the source format is eligible.
Supported hereJSON, XML, text, CSV, TSV, OtherSV with browser-approved writable file handles
Local boundarySave-back is local, explicit, and guarded. Drops, pasted text, workbooks, graphics, and archive entries use export-copy boundaries instead.
Useful for:
local save back
browser file save
safe file overwrite
File System Access
save CSV locally
Does WorkBench overwrite files automatically?
No. Save-back is only available for eligible sources with a writable browser file handle, warning, diagnostics, and receipt review.