1942589 - map.project-osrm.org - Unable to scroll the directions list with mouse wheel after creating a route between 2 points

Status: NEW

(Web Compatibility :: Site Reports, defect, P3)

Description

[Calin Tanase]

Environment:
Operating system: macOS Monterey 12.7.5/Windows 10
Firefox version: 128/134/136

Steps to reproduce:

1. Go to https://map.project-osrm.org/
2. Click on 2 locations on map to create a route.
3. Try scrolling the directions list on the right of the page with the mouse wheel/track pad/ keyboard keys.

Expected Behavior:
The directions list gets scrolled.

Actual Behavior:
Zooms the page.

Notes:

• Scrolling works only with click n drag on the scroll bar
• Reproduces regardless of the status of ETP
• Reproduces in firefox-nightly, and firefox-release
• Does not reproduce in chrome

Created from https://github.com/webcompat/web-bugs/issues/147147

Comment 1

[Calin Tanase]

Attachment: map project FF vs Chrome.mp4

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

Since nightly and release are affected, beta will likely be affected too.
For more information, please visit BugBot documentation.

Comment 3

[Dennis Schubert [:denschub]]

The wheel event handler on div#map seems to be eating the scrolling - disabling the handler makes it work.

Comment 4

[Emilio Cobos Álvarez (:emilio)]

Attachment: Reduced test-case.

This is effectively what's going on: They handle wheel in the container but prevent propagation of mousewheel on the inner child:

                          o.DomEvent.addListener(
                            this._container,
                            'mousewheel',
                            function (e) {
                              o.DomEvent.stopPropagation(e)
                            }
                          ),

That somehow works in Chrome to fully avoid firing wheel in chrome?

Comment 5

[Emilio Cobos Álvarez (:emilio)]

This seems to be an out-of-band modification of leaflet, which does the right thing... And the authors seem to be active, so we might be able to contact them...

Comment 6

[Emilio Cobos Álvarez (:emilio)]

I sent https://lists.openstreetmap.org/pipermail/osrm-talk/2025-January/002100.html