Coda,
Sorry, I am with you now. I didn't realize you meant "break the rules" of
the HTML spec. I didn't think of that, but I agree, re-using an ID is not
valid HTML. I don't know if there are exceptions to this rule for elements
like datalist, but there should be. Re-using a datalist when it makes sense
to seems efficient to me. A bigger issue would be the mixed browser support
for the datalist element, and for these reasons I too am skeptical. I guess
I would compare this to the "type" attribute. Browser support varies and
not every type works perfectly, but TiddlyWiki includes it as a parameter
in the EditText Widget, I suppose to support those edge cases where it
works. I agree a plugin/js library would provide a more robust solution,
but I am still on the fence as to whether adding this param makes sense. I
really think this functionality (using arrow keys and enter key to choose
an auto-complete option) should exist as a core feature, not a bolt-on. In
any case, I am tired of picking up my mouse when I search for something in
TiddlyWiki.
On Wednesday, September 18, 2019 at 9:29:31 PM UTC-5, coda coder wrote:
>
>
>
> On Wednesday, September 18, 2019 at 4:58:27 PM UTC-5, Alan Aldrich wrote:
>>
>> coda coder,
>> Yes the *id* attribute is required for the datalist element to work. It
>> must match the *list* attribute of the input element generated by the
>> EditText Widget. I am requesting we modify the EditText Widget to include a
>> parameter called *list *to allow the use of <datalist>.
>>
>
> Yep, got that, all understood. But I think you're missing my point. Let
> me try again...
>
> When you create Tiddler A with <$edit-text id="whatever" ...> and you
> subsequently RE-USE that content via transclusion in Tiddler B {{Tiddler
> A}} then you will have broken the rules -- there will be TWO elements with
> id="whatever" in the document.
>
> *The id attribute MUST be unique across the document* (not including any
> sub docs, like iframe documents).
>
> I suspect Jeremy doesn't use ids for this very reason.
>
> Unless you're happy creating tiddlers that cannot be used in the normal
> way, sorry, but this is very likely a non-starter.
>
> The spec: *When specified on HTML elements
> <https://html.spec.whatwg.org/multipage/infrastructure.html#html-elements>,
> the id <https://html.spec.whatwg.org/multipage/dom.html#the-id-attribute>
> attribute value must be unique amongst all the IDs
> <https://dom.spec.whatwg.org/#concept-id> in the element's tree
> <https://dom.spec.whatwg.org/#concept-tree> and must contain at least one
> character. The value must not contain any ASCII whitespace
> <https://infra.spec.whatwg.org/#ascii-whitespace>. *
> https://html.spec.whatwg.org/multipage/dom.html#the-id-attribute
>
> MDN: *The id global attribute
> <https://developer.mozilla.org/en-US/docs/Glossary/global_attribute>
> defines an identifier (ID) which must be unique in the whole document. *
> https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/id
>
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