use in custom element not working

[ray007]

I'm trying to show a RadarChart chart inside a custom element (implemented with lit element).

But instead of inside the shadow dom, I see 2 div elements with class="bb" added to the body.

I've tried with specifying the bindto argument as d2.selection or HTMLElement, but it doesn't change anything.
Otherwise, configuration for testing was taken from the basic example at https://naver.github.io/billboard.js/demo/#Chart.RadarChart.

No problems to see on the console, so no idea what could be going wrong...

[netil]

Hi @ray007, I made an example natively(not by using Lit)

• https://jsfiddle.net/netil/e2aL9ktd/

I see 2 div elements with class="bb" added to the body.

Based on your comment, can't figure out the cause, but from the above example you'll see one div element generated.