User:Eejit43/scripts/ajax-undo
| 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 | July 12, 2026 |
| Browsers | Tested on Chromium and Firefox |
| Skins |
|
| Source | User:Eejit43/scripts/ajax-undo.js |
| GitHub repository | ajax-undo.ts |
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.
Recent notable changes
For a more detailed changelog, see the script's GitHub commit history.
- July 12, 2026: Add dark mode support.
- 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}}
Global and other wiki installation
To install this user script globally, across all Wikimedia projects, add the following to your global.js on Meta-Wiki. See meta:Global user pages for more information.
This same method can be used to install the script on projects outside of the English Wikipedia, or even on MediaWiki wikis outside of Wikimedia.
mw.loader.load('//en.wikipedia.org/w/index.php?title=User:Eejit43/scripts/ajax-undo.js&action=raw&ctype=text/javascript'); // Backlink: [[w:en:User:Eejit43/scripts/ajax-undo.js]]
Note: if you install this script here and globally, it will be double-loaded. Add a check in your global.js to prevent this from happening as seen in this permalink, or simply only install the script in one location.
Comments/bug reports
Please leave comments or report bugs on my talk page, or file an issue on the GitHub repository.