[scoped-custom-element-registry] No support for append

[jonathandewitt-dev]

Description

Currently, the only way I can get scoped elements to upgrade is by using innerHTML, but if I attempt with append, nothing upgrades.

Example

This works:

shadowRoot.innerHTML = '<scoped-element></scoped-element>';

This does not:

shadowRoot.append(fragment);

Expected behavior

Element should upgrade when appended.

Actual behavior

Element is not upgraded.

Version

0.0.9

Browsers affected

• Chrome
• Firefox
• Edge
• Safari
• IE 11