The FilenameConflictAction type of the downloads API specifies what to do if the name of a downloaded file conflicts with an existing file.
This type defines the values that can be used for the conflictAction property of the downloads.download function's options parameter.
Values of this type are strings. Possible values are:
"uniquify"The browser will modify the filename to make it unique.
"overwrite"The browser will overwrite the old file with the newly-downloaded file.
"prompt"The browser will prompt the user, asking them to choose whether to uniquify or overwrite.
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
FilenameConflictAction |
Yes | 79 | 47 | ? | Yes | No | ? | ? | 48–79 | ? | No | ? |
prompt |
Yes | 79 | No | ? | Yes | No | ? | ? | No | ? | No | ? |
Note: This API is based on Chromium's chrome.downloads API.
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https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/downloads/FilenameConflictAction