Adds ability to pass object with mode value to shadow prop

[inigay]

No description provided.

[inigay]

Take a look at the change. The object or boolean-ish values work. Although it's still not rendering shadowRoot elements when closed is used

[karol-f]

@inigay Ach, I see. This is due to our use of shadowRoot, which is unavailable in closed mode - https://blog.revillweb.com/open-vs-closed-shadow-dom-9f3d7427d1af#f82a

We have to manually keep shadowRoot reference and change line with it's occurrence, e.g.:

vue-custom-element/src/utils/createVueInstance.js

Line 87 in 373d59f

rootElement.el = element.shadowRoot.children[0];

Regards!

[karol-f]

Hi, can is it possible to update the PR?