- From: Boris Zbarsky <bzbarsky@MIT.EDU>
- Date: Tue, 18 Jan 2005 18:56:44 -0600
- To: Peter Sorotokin <psorotok@adobe.com>
- CC: Jon Ferraiolo <jon.ferraiolo@adobe.com>, Cameron McCormack <cam-www-svg@aka.mcc.id.au>, www-svg@w3.org
Peter Sorotokin wrote: >>>> 2) That the implementation is keeping the event listeners for the >>>> two types in >>>> separate lists (is this desirable? Should registering a >>>> listener for both >>>> types involved make it get the event twice?). >>> >>> You can do it per-listener rather than on per-list basis; but I'd >>> keep two separate lists. >> >> >> In other words, a listener registered for both event names would >> indeed get the event twice? > > No, in this case each event listener entry in the list would have to > store an event type for which it was registered (also would be needed > for unregistering). I'm sorry, but I think you lost me. Say I have an event listener named "listener" and an event target named "target". We have our two event types "type1" and "type2". I execute the following code: target.addEventListener("type1", listener, false); target.addEventListener("type2", listener, false); when the event fires, how many times will my listener's handleEvent method be called? Please note the provisions on addEventListener for registering identical listeners. Further, what is the behavior of: target.addEventListener("type1", listener, false); target.removeEventListener("type2", listener, false); ? The answers to these questions should be clearly documented in the specification of what it means for the two event names to be "equivalent". -Boris
Received on Wednesday, 19 January 2005 00:59:05 UTC