848628 - Mouse wheel regression causes chunnel.com text scrolling to also scroll entire page

Status: RESOLVED INVALID

(Core :: DOM: Events, defect)

Description

[Chris Peterson [:cpeterson]]

STR:
1. Open http://www.chunnel.com/take-the-chunnel-train
2. Mouse over the "Are you Ready to Be Astounded?" text.
3. Scroll the text using using a mouse wheel or trackpad gesture. (I'm using a MacBook Pro running OSX 10.8.2.)

EXPECTED:
The text to scroll.

RESULT:
The text scrolls, but the entire page scrolls, too.

This bug was a regression in Nightly 17.0a1 (2012-08-12). I believed this bug was caused by DOM3 wheel event bug 719320. Here is the pushlog for build 2012-08-12:

https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=b5ae446888f5&tochange=df8bdd5813f0

Comment 1

[Chris Peterson [:cpeterson]]

btw, neither Chrome nor Safari scroll page when scrolling the text.

Comment 2

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

The reason is the script (http://www.chunnel.com/wp-content/w3tc/min/ef352/default.include.06c965.js) handles neither MozMousePixelScroll nor wheel event. So, this shouldn't be a regression. Perhaps, this can be reproduced before 16 and earlier on both Mac and Windows (needs some additional condition of the device).

So, Please do marking INVA or changing product to Evangelism.

FYI:
https://developer.mozilla.org/en-US/docs/Mozilla_event_reference/wheel?redirectlocale=en-US&redirectslug=DOM%2FDOM_event_reference%2Fwheel#The_event_order_with_legacy_mouse_scroll_events
https://developer.mozilla.org/en-US/docs/DOM/DOM_event_reference/DOMMouseScroll
https://developer.mozilla.org/en-US/docs/DOM/DOM_event_reference/MozMousePixelScroll