(In reply to csheany from comment #36) > Something is getting lost in translation. > > The summary says "if viewport is only scrollable when zoomed in" but the viewport is scrollable when zoomed out. Ok, I understand the confusion now. First, as "viewport" is an overloaded term, let me clarify that in this context by "viewport" I meant the <html> element. (I edited the bug summary accordingly.) On Bugzilla, the <html> is only ever scrollable when zoomed in. If the page is scrollable when zoomed out, the (only) thing that's scrolling is the <div>. The issue occurs when both the <div> and the <html> are scrollable (otherwise, there is no "handoff"). The "if <html> is only scrollable when zoomed in" in the bug title does not refer to the conditions that trigger this bug, but rather a limitation on the solution I'm proposing: I'm proposing to allow immediate handoff from the <div> to the <html>, but limited to cases where the <html> is only scrollable when zoomed in. (Allowing immediate handoff from a <div> to the <html> *in general* would defeat the original intent of bug 1230552.)
Bug 1531474 Comment 38 Edit History
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(In reply to csheany from comment #36) > Something is getting lost in translation. > > The summary says "if viewport is only scrollable when zoomed in" but the viewport is scrollable when zoomed out. Ok, I understand the confusion now. First, as "viewport" is an overloaded term, let me clarify that in this context by "viewport" I meant the <html> element. (I edited the bug summary accordingly.) On Bugzilla, the <html> is only ever scrollable when zoomed in. If the page is scrollable when zoomed out, the (only) thing that's scrolling is the <div>. The issue occurs when both the <div> and the <html> are scrollable (otherwise, there is no "handoff"). The "if <html> is only scrollable when zoomed in" in the bug title does not refer to the conditions that trigger this bug, but rather a limitation on the solution I'm proposing: I'm proposing to allow immediate handoff from the <div> to the <html>, but limited to cases where the <html> is only scrollable when zoomed in. (Allowing immediate handoff from a <div> to the <html> *in general* would defeat the original intent behind disallowing immediate handoff on Android (bug 1230552).)