Created attachment 509930 [details] Simple page to demonstrate the bug If you have following code: <div> <p>drop file here</p> </div> and you drag a file without droping in this sequence desktop -> div -> paragraph -> div -> desktop dragenter[object HTMLDivElement] dragenter[object HTMLParagraphElement] # bug, we are entering paragraph before leaving div dragleave[object HTMLDivElement] # bug, we leave div after entering paragraph dragenter[object HTMLDivElement] dragleave[object HTMLParagraphElement] # same bug here, we enter div before leaving paragraph dragleave[object HTMLDivElement] On almost every platform I've worked on, drag'n'drop events are messed up in minor ways like this, it'd be nice if you guys fixed it. Attached is a simple page that demonstrates the bug.
This is not a bug; it's in the spec: http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html#drag-and-drop-processing-model In the second list of steps (the ones repeated regularly), step 3 fires the dragenter, and then step 4 fires the dragleave.
See also https://bugzilla.mozilla.org/show_bug.cgi?id=619703, I think this is a duplicate. (This ordering can actually make it easier to deal with leave events triggered on a parent when the mouse enters a child — [enter (parent), enter (child), leave (parent)] can be detected as mouse still in parent whereas [enter (parent), leave (parent), enter (child)] could cause mayhem especially if the child element is removed when the drag leaves the parent.
Status: NEW → RESOLVED
Last Resolved: 2 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 619703
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