Correct way to handle boolean attributes

[yohcop]

Hi,

Is there a way to handle boolean attributes, such as selected in an <option> ?

I've tried different variations, including typed and non typed, but the best I could end up with it <option selected="false"> which counter-intuitively means that the option is in fact selected.

I see the Attribute enum, with Empty/Missing options, but it seems that typed::elements::option wants the selected attribute to be a String, and not a variant of that enum.

Here are a few things I tried:

• Boolean - is accepted but false is converted to "false", which is then interpreted by the browser as selected.

    <typed::elements::option selected={false}>abc</typed::elements::option>

• With an Attribute type, doesn't compile: the value is expected to implement Display.

    <typed::elements::option selected={Attribute::<String>::Missing}>xyz</typed::elements::option>
    <option selected={Attribute::<String>::Missing}>xyz</option>

• In the non-typed version, I also tried with a pair (String, Option) as it is the type of attributes, but this doesn't parse at all either.

    <option {("selected", None)}>xyz</option>

And yet a few more variations of the above.

Is it doable?

What is needed for handling those attributes, is something that would output either <option selected> / <option selected="..."> or just <option> based on some boolean. I can of course have an outer if/else, but it leads to repeated code for other attributes of the option.

Thanks,