485324 - HTMLCollection/NodeList prototype problem

Status: RESOLVED WORKSFORME

(Core :: DOM: Core & HTML, defect)

Description

[bugzilla33]

User-Agent:       Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1b3) Gecko/20090305 Firefox/3.1b3

HTML Collection prototype problem


Reproducible: Always

Steps to Reproduce:
1. Run HTMLCollection.html from attachement
2. Should alert value: 2
3. Try on IE 8.0 - works perfect

Actual Results:  
Error: document.getElementsByTagName("div").indexOf is not a function
Source File: file:///C:/HTMLCollection.html
Line: 14


Expected Results:  
alert value: 2

Comment 1

[bugzilla33]

Attachment: HTMLCollection

Comment 2

[Mike Shaver (:shaver -- probably not reading bugmail closely)]

Behaviour of .prototype (and its relationship to further-delegating objects) isn't standardized anywhere -- why do you believe that we should have IE8's behaviour here, out of curiosity?  This is a dup of something, I think related to getElementsByClassName, but I can't recall it off-hand.

Comment 3

[bugzilla33]

I think now that getElementsByTagName shoudl return NodeList (not HTMLCollection)

Konqueror, Safari, Opera, Chrome return NodeList. Only IE returns HTMLCollection.

But FF NodeList also fails!

if(!NodeList.prototype.indexOf)NodeList.prototype.indexOf=function(V,I){for(I=I||0;I<this.length;I++)if(this[I]===V)return I;return -1}

Comment 4

[bugzilla33]

Attachment: NodeList

Comment 5

[Cameron McCormack (:heycam)]

Assuming getElementsByTagName() was meant to return an HTMLCollection, then it would be the fact that HTML 5 defines HTMLCollection using Web IDL that would require particular behaviour of .prototype.  (Web IDL admittedly isn't quite baked yet, but I think it's likely that requiring window.HTMLCollection.prototype be the collection object's [[Prototype]], and for the prototype object to be mutable like the test assumes, would survive.)

I suppose someone would need to write a version of DOM Core using Web IDL to get similar requirements for NodeList (perhaps http://simon.html5.org/specs/web-dom-core will be that).