[whatwg] What it means for attributes of <input> to apply or not apply
ian at hixie.ch
Thu Jan 12 17:42:43 PST 2012
On Wed, 22 Jun 2011, Edward O'Connor wrote:
> When adding the placeholder="" attribute to <input type=number>, one of
> our engineers asked me about the behavior of content attributes that
> don't apply to certain input types.
> Consider for example <input type=range>. The spec says "[t]he following
> content attributes *must not be specified* and *do not apply* to the
> element: [
]" (emphasis mine). The first bit ("must not
> be specified") is clear: it's an authoring conformance requirement.
> The second bit ("does not apply to the element"), however, isn't clear.
> Is it a UA conformance requirement? What does it mean? I *think* it
> means that the placeholder="" attribute has no effect on the rendering
> of <input type=range>. Does it also mean that the placeholder="" content
> attribute shouldn't be reflected as an IDL attribute on <input> elements
> of type=range? In Safari 5, Firefox 4, and Opera 11, placeholder="" gets
> reflected as an IDL attribute, regardless of the value of type="".
On Wed, 22 Jun 2011, Aryeh Gregor wrote:
> It's reflected regardless of the type:
> "does not apply to the element" could use clarification, though.
On Thu, 23 Jun 2011, Ian Hickson wrote:
> It's a hook used here:
> I'll add a hyperlink or something to make it clearer.
Now done. Let me know if it's still confusing.
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
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