GetElementById from within Shadow DOM

Question

I have a custom-element with shadow DOM, which listens to attribute target change.
target is supposed to be the ID of the element which my comp

Answer 1

You just have to call Shadow​Root.

this.shadowRoot.getElementById('target') should work.

Here's an example, the get syntax will bind an object property to a function.

get target() {
    return this.shadowRoot.getElementById('target');
}