No attribute value rendered as "true"

[jvmccarthy]

I'd like to render an element attribute with an optional value. For example,

<div no-value></div>

However, svelte is rendering this with the value of "true",

<div no-value="true"></div>

If I add an empty string value, the rendering is as expected. This,

<div no-value=""></div>

renders as,

<div no-value></div>

I think the underlying call to setAttribute() should be a blank string if there is no value instead of true.

Svelte repl here. Inspecting the rendered output shows how without an attribute value, a value of "true" is rendered.

[Ryuno-Ki]

IIRC that behaviour is valid for XHTML. Maybe Svelte is doing something here …
Only with HTML5 it became valid for an attribute to not have a value. That is, it's mere presence implied the value of true.