Intent to change: Single tap may be retargeted to clickable element around the tapped point
Masayuki Nakano
Summary: Currently, Gecko may retarget each touch to an element which is near the touch point and has some touch event listeners. However, once we conform to new spec for considering `click` event target, Android users may hard to tap clickable element if surrounding element has touch listeners. Therefore, when the touch is first touch, Gecko starts to retarget the `pointerdown` and `touchstart` event target to clickable element too.
Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1957321
Specification: N/A
Platform coverage: Android (desktop users can enable the feature
with `ui.touch.radius.enabled` pref)
Preference: ui.touch.radius.single_touch.treat_clickable_as_touchable
DevTools bug: N/A
Other browsers: Blink has similar heuristic feature, but I don't know the details. I don't know about WebKit.
web-platform-tests: N/A (but we have a mochitest)
-- Masayuki Nakano <masa...@d-toybox.com> Working on DOM, Events, editor and IME handling for Gecko