[whatwg] Clarification request for charset/characterSet/defaultCharset
ian at hixie.ch
Tue Aug 10 15:26:05 PDT 2010
On Tue, 6 Jul 2010, Nicholas Zakas wrote:
> I was just reading through the spec and am having trouble understanding
> the details of document.charset, document.characterSet, and
> document.defaultCharset. It seems to me that document.characterSet is
> simply a read-only equivalent of document.charset (I'm guessing these
> are both here due to already-existing implementations), which is a
> little confusing but not terribly so. I'm more interested in
> document.defaultCharset and how it relates to the others.
All three are there for historical reasons.
> Some questions:
> 1) Should document.charset/document.characterSet always start out
> equivalent to document.defaultCharset?
What do you mean by "start out"?
> 2) What is the canonical source of truth for document.defaultCharset (is
> this a system setting, a browser setting, or a document setting)?
There is no truth to speak of for defaultCharset. The browser can return
any arbitrary value.
> 3) If document.charset is set to a new value, is there any change
> reflected in document.defaultCharset? What about vice-versa?
Nope. defaultCharset is read-only, so cannot be set by the author. Its
return value can vary arbitrarily.
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
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