17628 2012-06-28 10:17:05 +0000 delta attributes of WheelEvent should be double rather than float 2012-09-12 04:31:21 +0000 1 1 1 Unclassified WebAppsWG HISTORICAL - DOM3 Events unspecified All All RESOLVED FIXED needsReview P2 normal --- 1 masayuki travil bugs mike travil www-dom public-webapps-bugzilla oldest_to_newest 69482 0 masayuki 2012-06-28 10:17:05 +0000 I think that the type of deltaX, deltaY and deltaZ attributes of WheelEvent should be double rather than float. If they are float, the initialized values of untrusted events and the result of the attributes cannot match easily. For example: var e = new WheelEvent("wheel", { deltaX: 1/3 }); alert(e.deltaX == 1/3); The result could be false due to the fractional error. float is useful when a lot of values are stored in arrays. However, delta values are not so. So, I think that the type of delta values should be double. The example may not be a realistic situation. However, if web application developers met to this problem, they would feel strange. Currently, I'm working on implementing D3E WheelEvent on Gecko. We're using double for them. https://bugzilla.mozilla.org/show_bug.cgi?id=719320 72634 1 travil 2012-08-23 20:29:58 +0000 Double is fine. 72635 2 bugs 2012-08-23 20:33:27 +0000 FYI, Gecko uses double already. 72636 3 travil 2012-08-23 20:36:21 +0000 Fixed in revision 237: http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html?rev=1.237 73672 4 masayuki 2012-09-12 04:31:21 +0000 nit: http://www.w3.org/TR/2012/WD-DOM-Level-3-Events-20120906/#events-WheelEvent readonly attribute double deltaX; readonly attribute double deltaY; readonly attribute double deltaZ; readonly attribute unsigned long deltaMode; The indentation is wrong. I guess that you just replaced "float" with "double". The length is increased 1 character.