17627 2012-06-28 09:59:11 +0000 The order of mouseenter/leave events in a subtree should be defined 2012-08-23 23:17:04 +0000 1 1 1 Unclassified WebAppsWG HISTORICAL - DOM3 Events unspecified PC Linux RESOLVED FIXED needsReview P2 normal --- 1 bugs travil mike travil wizard04 www-dom public-webapps-bugzilla oldest_to_newest 69481 0 bugs 2012-06-28 09:59:11 +0000 <div id="outer"><div id="middle"><div id="inner">foo</div></div></div> When you move mouse to over the foo, mouseenter should be dispatched first to outer, then middle, then inner. When you move mouse out from foo, mouseleave should be dispatched first to inner, then middle, then outer. (That is how IE, Opera and Gecko behave atm) 71684 1 travil 2012-07-30 23:29:59 +0000 Agree. 71686 2 travil 2012-07-31 00:08:06 +0000 Fixed by adding a 3rd sequence of events and description to section 5.2.3.2 71747 3 wizard04 2012-08-01 17:22:06 +0000 Since all three divs have the same dimensions and position, only a single mouseover is dispatched (to inner) when the mouse is moved from outside of the divs to over the foo. I think it should be made clear that mouseenter will then be dispatched to each of outer, middle, and inner (not just inner). 71857 4 travil 2012-08-06 18:26:30 +0000 Ah got it. I assumed no-overlap in my scenario. A picture would be helpful to explain this too. I'll give it a shot. 72675 5 travil 2012-08-23 23:17:04 +0000 Checked in the updated scenario (including an explanatory graphic) into the same section. I think this resolves the bug :-) Thanks http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html