Using deprecated mousewheel event

[Joncom]

The engine uses: https://developer.mozilla.org/en-US/docs/Web/API/Element/mousewheel_event

Impact/lib/impact/input.js

Line 160 in 301f544

var delta = event.wheelDelta ? event.wheelDelta : (event.detail * -1);

Impact/lib/weltmeister/evented-input.js

Line 58 in 301f544

var delta = event.wheelDelta ? event.wheelDelta : (event.detail * -1);

which is apparently deprecated

This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible

and non-standard

This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

[Joncom]

Weltmeister "touch scrolling" is currently broken in Firefox due to this issue.