Hi, I've stumbled across this nice extension, but it seems like it does only work in Firefox.
When using Vivaldi (in a new private window) I can move the sliders but the pages shown / diff won't change.
I guess that must be known already, but maybe there could be a warning somewhere in the tutorial to curb expectations.
Thanks a lot for the report, that's super helpful! RevisionSlider is supposed to work the same in all browsers including Vivaldi. Can you possibly provide more information? Especially on which wiki this happens and which skin you are using?
I've just tested it again on the english Wikipedia with the article of the day.
No special skin, just the default.
To be sure that no extensions / addons are interfering, I used a new private window.
I can't post a direct link to a screenshot, but here you go
imgur dot com /a/CDjtNB8
And here is the popup for the yellow dot:
imgur dot com /a/4Eyl4fx
The popup on the yellow dot says: Date 3 November 2022, the revision shown under it says: Date 19 November 2022.
The blue dot is on the rev. from 20 Nov, which is correctly shown underneath. The next earliest revision is the one from 19th Nov which is shown on the left instead of the one that was selected with the yellow dot.
I have tried a few things:
In the Revision history, select two versions that are not directly in sequence and click "compare selected revs". Then open the slider. The two revisions will be shown correctly.
Now click on the lower half of the graphic to move only the yellow dot.
As a result, the yellow dot will move to the new position, but the blue dot will move right next to it. (Is this a bug or a feature? It's not intuitive to me.) Both the displayed revisions will be changed to the new dates.
If you instead drag the yellow dot, the blue dot will remain where it was. But dragging the yellow dot will not lead to a refresh of the revision shown underneath.
Dragging the blue dot seems to crash the RevisionSlider: the revision comparison disappears after some delay, and the article is shown instead (but the title says [Article Name]: Difference between revisions)
Checking on the German Wikipedia, I can't drag the blue dot at all with Vivaldi.
When I started with two not adjacent revisions, they were displayed correctly.
When dragging the yellow dot, the revision shown will change to the one that comes just before the one with the blue dot.