User:Eejit43/scripts/ajax-undo
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This user script adds a link following "undo" on page histories and diff views, allowing the edit to be undone without leaving the history/diff page. It allows for an optional comment to add to the edit summary.
| ajax-undo | |
|---|---|
 Top: history view before button click Bottom: diff view after button click | |
| Description | User script to easily undo edits |
| Author | Eejit43 |
| First released | February 16, 2023 |
| Updated | January 13, 2026 |
| Browsers | Tested on Chromium and Firefox |
| Skins |
|
| Source | User:Eejit43/scripts/ajax-undo.js |
| GitHub repository | ajax-undo.ts |
Recent notable changes
For a more detailed changelog, see the script's GitHub commit history.
- January 13, 2026: Fetch undo summary message for local language rather than using hardcoded value.
Installation
Simple
Install Enterprisey's "script-installer" (at Preferences → Gadgets → Advanced → 
Install scripts without having to manually edit JavaScript files (documentation)), then come back to this page and click the "Install" button in the infobox on the right.
Manual
Add the following to your common.js (or a skin specific JavaScript page):
{{subst:install user script|User:Eejit43/scripts/ajax-undo.js}}
Please leave comments or report bugs on my talk page, or file an issue on the GitHub repository.