Le 09/01/2012 06:29, Brendan Eich a écrit :
On Jan 8, 2012, at 7:20 PM, John J Barton wrote:
On Sun, Jan 8, 2012 at 3:35 PM, Brendan Eich <[email protected]
<mailto:[email protected]>> wrote:
Firebug uses a library bind a lot, and we continually struggled
with the memoization problem; we did not try to solve it in part
because we hated Firebug's bind: it made debugging even more
painful since it messes up the call stack. Using the ES bind()
ends up not being a win, since I now have exactly the same problems.
I have a question: why is bind used so much in Firebug for event
listeners, when the DOM guarantees to dispatch them with the
event target bound to |this|? Way back in '95, I created event
handlers but did not add bind (it had to be discovered later).
But dynamic |this| binding combined with DOM event target-based
listening and handling kept this properly bound. What has changed?
Sorry I don't know what you mean here.
Why all the this-binding in Firebug if (as you suggested and a grep
seems to confirm [but I skimmed]) the methods being this-bound are all
or mostly event listeners? The DOM dispatches event handlers on the
correct |this|.
Relevant related documentation:
https://developer.mozilla.org/en/JavaScript/Reference/Operators/this#As_a_DOM_event_handler
David
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