[whatwg] Why do HTML*Collection's nameItem need to return 5 different objects?
ian at hixie.ch
Fri Jul 13 15:17:28 PDT 2012
On Fri, 13 Jul 2012, Ryosuke Niwa wrote:
> According to
> *HTMLCollection* returns the first element.
This is for compat in the default case, I believe.
> *HTMLAllCollection* returns the first element or another HTMLAllCollection
> if there are multiple elements
This is needed for IE compat.
> *HTMLFormControlsCollection* returns the first element or RadioNodeList if
> there are multiple elements
This is needed to support the radio button value feature.
> *HTMLOptionsCollection* returns the first element or live NodeList if there
> are multiple elements
This is for compat, I believe. (We don't want to return just a node if
there are many matching.)
> *HTMLPropertiesCollection* returns PropertyNodeList
This is to support the value features for microdata.
> Can those 3 classes somehow return the same object? FWIW, WebKit has
> always returned a static node list.
WebKit doesn't support the microdata and radio button features,
presumably, and is presumably less than perfectly compatible with the Web
for the others. :-)
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
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