I'm putting a custom element in a template and then "selecting" it out to Window level. It seem to loose its identity as a custom element.

```
// In page
<template id="holder">
    <my-element field="A"></my-element>
</template>

<script type="module">
    class MyElement extends HTMLElement {
        constructor() {
            super();
        }
        get Field() { return this.getAttribute("field");}
    }

    window.customElements.define("my-element", MyElement);
</script>

<script>
    const frag = document.querySelector("#holder").content;
    const el = frag.querySelector("my-element");
    console.log({el});
</script>
```

When `<my-element>` is a page level and not in a template I can read `xxx.Field`. When it comes from within a template it seems to no longer act like the custom element - xxx.Field isn't defined. The script selecting it is at "Window" level, so shouldn't it "cast" correctly?
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Edit: Removed. Wrong forum.