Support for `Element::add_attribute`

[grekko]

I'm using the ruby binding for lol_html and would really like to be able to transform <p>Foo</p> into <p data-this-is-special>Foo</p>.

I understand that the lol_html API currently implements Element.html#set_attribute with a String value, but does not yet provide a similar Element#add_attribute-method which writes an attribute without a String value.

Is Element#add_attribute something other ppl are interested in and something someone else would be willing to implement? I myself have no rust knowledge (yet) and would have to depend on someone else to provide the code here :)

[bglw]

Note that from the perspective of the HTML spec, data-thing and data-thing="" are exactly equivalent. Omitting a value parses as the empty string.

The difference is purely aesthetic, which isn't something I'm aware of existing in lol_html as yet since it deals with HTML semantics.

(disclaimer: not a maintainer)

[grekko]

Note that from the perspective of the HTML spec, data-thing and data-thing="" are exactly equivalent.

Absolutely, thanks for clearing that up. My point is that I'll be reading the generated output and <p data-thing>Foo</p> is just easier and quicker to read for me personally than <p data-thing="">Foo</p>.