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Thanks for your feedback about the new way of visualizing differences of changes to pages on MediaWiki-based projects. All comments are read, in any language, but personal replies are not guaranteed: the team will try and go through reports here at least once a week. Need more attention? Report a new bug directly in Phabricator

Fixed a typo, shows the entire content on "diff"

Summary by ESanders (WMF)
Chbrandt (talkcontribs)

I fixed a typo (Postgress) at page "New Developers", and it is showing the entire content on "diff": all red and all green. I was expecting to see only the edited text (Postgress -> Postgres, or really 's' -> ' ') diff'd. To have the entire content highlighted (red/green) is confusing.

ESanders (WMF) (talkcontribs)

The visual diff will not work well on pages with <translate> tags. We could consider turning it off on such pages.

Vhhhhjhgy (talkcontribs)

@Chbrandt it shows as entire text but actually only changes you made are done. Rest is all same.

Chbrandt (talkcontribs)

@Vhhhhjhgy right, I understood that. I was just pointing out that -- visually -- it is confusing, a lot of...visual noise. And the goal of the issue was to raise/highlight the matter; maybe the diff algorithm could focus on what in the text _content_ actually diff/changed.

Table sorting: no show

Bertux (talkcontribs)

Nl:special:diff/60191909 (simply correcting a sorting error) shows up immediately in Wikitext, but takes endlessly in visual mode. When I switched back to wikitext diff after waiting for fifteen minutes (!) it responded immediately. A second try gave the same result.

I encountered the problem while editing in the visual mode, but clicking the diff from the history page or the link above made no difference.

The previous diff has no such issues. My computer is a chromebook with lavish amounts of memory but a slow outdated processor. The browser is Chrome of course.

Error contacting the Parsoid/RESTBase server (HTTP 404)

Shotacoffey (talkcontribs)
Whatamidoing (WMF) (talkcontribs)

Usually it just means there was trouble with the internet connection (could be your ISP, could be the servers), and if you wait a few minutes and try again, it works out.

Preview impossible

Mylenos (talkcontribs)


J'ai modifié 2 ou 3 fois la page "Sidi Bou Saïd" et par 2 fois, il a été impossible de revoir mes modifications. Comme actuellement, d'ailleurs. La ligne bleue reste au début à gauche. Si je bouge le curseur sur la petite fenêtre (l'encadré) de "Relire vos modifications", la ligne bleue va de gauche à droite sans jamais afficher mes modifications.

J'ignore si cela vient de mon Mac ou de WP.


Whatamidoing (WMF) (talkcontribs)

It works for me today.  Are you still having this problem?

(Cela fonctionne pour moi aujourd'hui.  Avez-vous toujours ce problème ?)

Error on preview

Indil77 (talkcontribs)

When i try to make preview of changes the editor tell me the following message:

Error during loading data from server: Error contacting the Parsoid/RESTBase server (HTTP 403).

Any suggest?

Lotje (talkcontribs)

I have the same problem. Guess we need someone out here who is willing to look into this.

Whatamidoing (WMF) (talkcontribs)

I believe this was a temporary problem with the server. I can't find official documentation of the incident right now; sorry. Thank you both for reporting it.

Paul K. (talkcontribs)

The word `aankoop` is suddenly wrongly changed

Whatamidoing (WMF) (talkcontribs)

Paul, can you please tell me more? Also, do you have any ad-blocking software installed?

Afrouzaz (talkcontribs)

Hello. i've just migirate from mediawiki 1.34 to 1.35 and when i click on save button on visual editor, i am getting this error: Error contacting the Parsoid/RESTBase server (HTTP 403).

could someone help please?

ESanders (WMF) (talkcontribs)

These errors sound like T265043. There are a few suggested fixes in that discussion.

Nghtchld (talkcontribs)

I am putting this out more widely as an answer to this issue as I had a LOT of trouble resolving it. Basically, on some (cPanel) hosted sites the Parsoid/RESTBase Server API communications are blocked by several (PHP) ModSecurity rules. My host does not allow you to disable ModSecurity using .htaccess so I had to contact my hosting tech support and get them to whitelist rules for my wiki one or two at a time, while generating new ModSecurity rule errors by attempting to edit using VisualEditor, until we had found all the rules which were resulting in this error.

NB: At some point during this process a few pages might start working - not throwing a 403 - but then test a few more pages as they might still trigger ModSecurity.

Wikimedia API portal skin's floated top navbar covers controls

Summary by APaskulin (WMF)

Moved to phab:T283896

Cedarlakeventures (talkcontribs)
APaskulin (WMF) (talkcontribs)

Only changed a citation, diff shown was wrong

Summary by Whatamidoing (WMF)
AxelBoldt (talkcontribs)

In this edit I had used the "edit source" link next to the section header "Later career". I only changed the contents of one citation template. Before publishing the changes, I clicked on "Review your changes". The shown diff was completely wrong; it only highlighted some footnote number, but not the actual change I made.

This problem is reproducible if you follow the above steps.

Whatamidoing (WMF) (talkcontribs)

I think this is fixed already? When I checked the visual diff, I got a red line showing:

Peace, William. "Head Nurses". Atrium. Retrieved 16 December 2015.

and a green line showing:

Peace, William (Winter 2014). "Head Nurses" (PDF). Atrium. No. 12 "Bad Girls". pp. 20–22. Retrieved 9 July 2020.

(both with the expected links for the title).

AxelBoldt (talkcontribs)

@Whatamidoing (WMF): No, the issue isn't fixed. If you click on this edit and then choose "Visual", you will indeed get a correct visual diff. But if you follow my steps (edit the section, change a reference, and review your changes before publishing the edit), the displayed diff will be wrong.

This post was hidden by AxelBoldt (history)
Whatamidoing (WMF) (talkcontribs)

I had assumed that the diffs would match, but they don't. Phab:T260008 describes the problem. Please feel free to "Be Bold" and edit the description or add a comment to explain further, if you think anything is wrong/missing.

Visual diff weird display

Dough34 (talkcontribs)

On page "Thomas E. Kurtz" in English Wikipedia I made several edits using the visual editor, but when I asked for a preview it looks all wrong. I don't see any of my edits in the text and all of the text is highlighted with one of two different colors, some of it with light orange background, but most with a light blue background. Very strange, never seen this before.

Dough34 (talkcontribs)

More of the same bad visual diff behaviour in "John Tukey" in English Wikipedia. Description is same as report above.

Vhhhhjhgy (talkcontribs)

Hi @Dough34, it must be some of wiki markup. Can you please attach a screenshot. It would really help.

Error contacting the Parsoid/RESTBase server (HTTP 415)

VSN-Herman (talkcontribs)

Day All, I have scrolled through the various topics but could not find an answer and hence I am starting a new topic anyway.

When I try to edit a page with the visual text editor on the site I get the message "Error contacting the Parsoid/RESTBase server (HTTP 415)" when saving.

Does anyone know how I can solve this ?

Parsoid/RESTBase server error

CodingCyclone (talkcontribs)

Hi everyone! I've been having a problem when saving large edits with the Visual Editor. When I try to save my edit, it says "Error contacting the Parsoid/RESTBase server (HTTP 504)." I've had this error multiple times. Trying to re-save the edit does not help. Sorry if this has been discussed before or if it is a result of my own folly. I'm not the most savvy when searching. For reference, this is happening on the English Wikipedia.