- From: Ian Hickson <ian@hixie.ch>
- Date: Mon, 12 Oct 2009 01:44:39 +0000 (UTC)
On Tue, 6 Oct 2009, Kartikaya Gupta wrote:
>
> If we have this page:
>
> <html><body>
> <input type="hidden" value="foo" id="i">
> <script type="text/javascript">
> var i = document.getElementById('i');
> i.value = 'bar';
> alert( i.getAttribute('value') );
> </script>
> </body></html>
>
> What should the alert display?
It was foo, per the spec.
> From my reading of the spec I believe it should display 'foo'. For
> type=hidden, "The value IDL attribute applies to this element and is in
> mode value" and in mode value, "On setting, it must set the element's
> value to the new value, set the element's dirty value flag to true
> [...]". Reading the content attribute after should still return the
> original 'foo'.
>
> However, Firefox, Opera, IE6, and Chrome all alert 'bar'.
Fixed the spec.
> If I change the type from hidden to text, then FF, Opera, and Chrome all
> alert 'foo', but IE6 still gives me 'bar'. This, despite both 'hidden'
> and 'text' are in mode value, and so should behave the same according to
> the spec.
IE does all kinds of weird things with forms. Try getAttribute('defaultValue')...
> Another related test case is this one:
>
> <html><body>
> <input type="hidden" value="foo" id="i">
> <script type="text/javascript">
> var i = document.getElementById('i');
> i.value = 'bar';
> i.removeAttribute('value');
> alert( i.value );
> </script>
> </body></html>
>
> According to the spec, setting i.value should set the dirty value flag.
> This means that when the content attribute is removed, it shouldn't
> affect what i.value returns for the alert. However, Firefox, Opera, and
> Chrome all alert the empty string. It seems they all have special
> behavior for type=hidden that isn't specced fully.
This is now fixed too, as far as I can tell.
Thanks,
--
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
Received on Sunday, 11 October 2009 18:44:39 UTC