[Webkit-unassigned] [Bug 21257] JS bindings should throw when too few arguments are passed

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=21257





--- Comment #13 from Darin Adler <darin at apple.com>  2010-06-02 17:41:44 PST ---
Personally, I was a fan of consistency between the DOM and the functions built in to the JavaScript language. But if no other browsers are doing it that way, and this is even specified in a future standard, it seems that was wrong.

Like other such sweeping changes, it’s highly likely there is some content unwittingly depends on our old behavior. All a programmer has to do is forget one argument to a function, and the program gets an exception whereas before it would keep running. If it’s code or a code path that was never tested with engines other than WebKit then this could easily be overlooked.

Thus this change is almost certain to break  “Safari-only” code paths or even “WebKit-only” ones on at least some websites, Dashboard widgets, Mac OS X applications, iPhone applications, and iTunes Store content. Other than that, I’m all for it!

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