appendTarget hiding/selecting issues for shadowdom

Prerequisites

• I am running the latest version
• I checked the documentation and found no answer
• I checked to make sure that this issue has not already been filed

💥 Demo Page

I can do it in some days, i need some time to build a simple lit element for this.

Explanation

• What is the expected behavior?

There are a lot of document.body checks in the code which doesn't work in shadowdom. It should be the appendTarget element:

https://github.com/yairEO/tagify/blob/master/src/parts/dropdown.js#L155 https://github.com/yairEO/tagify/blob/master/src/parts/dropdown.js#L218

• What is happening instead?

Checking in the document.body instead of appendTarget

• What error message are you getting?

A lot of glitches.