| CONSOLE MESSAGE: NotSupportedError: Failed to upgrade an element with shadow root: the custom element definition disallows shadow roots. |
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| PASS Creating an element in the document of the template elements must not enqueue a custom element upgrade reaction because the document does not have a browsing context |
| PASS Creating an element in the document of the template elements and inserting into the document must not enqueue a custom element upgrade reaction |
| PASS Creating an element in the document of the template elements and adopting back to a document with browsing context must enqueue a custom element upgrade reaction |
| PASS Creating an element in a new document must not enqueue a custom element upgrade reaction because the document does not have a browsing context |
| PASS Creating an element in a new document and inserting into the document must not enqueue a custom element upgrade reaction |
| PASS Creating an element in a new document and adopting back to a document with browsing context must enqueue a custom element upgrade reaction |
| PASS Creating an element in a cloned document must not enqueue a custom element upgrade reaction because the document does not have a browsing context |
| PASS Creating an element in a cloned document and inserting into the document must not enqueue a custom element upgrade reaction |
| PASS Creating an element in a cloned document and adopting back to a document with browsing context must enqueue a custom element upgrade reaction |
| PASS Creating an element in a document created by createHTMLDocument must not enqueue a custom element upgrade reaction because the document does not have a browsing context |
| PASS Creating an element in a document created by createHTMLDocument and inserting into the document must not enqueue a custom element upgrade reaction |
| PASS Creating an element in a document created by createHTMLDocument and adopting back to a document with browsing context must enqueue a custom element upgrade reaction |
| PASS Creating an element in an HTML document created by createDocument must not enqueue a custom element upgrade reaction because the document does not have a browsing context |
| PASS Creating an element in an HTML document created by createDocument and inserting into the document must not enqueue a custom element upgrade reaction |
| PASS Creating an element in an HTML document created by createDocument and adopting back to a document with browsing context must enqueue a custom element upgrade reaction |
| PASS Creating an element in an HTML document fetched by XHR must not enqueue a custom element upgrade reaction because the document does not have a browsing context |
| PASS Creating an element in an HTML document fetched by XHR and inserting into the document must not enqueue a custom element upgrade reaction |
| PASS Creating an element in an HTML document fetched by XHR and adopting back to a document with browsing context must enqueue a custom element upgrade reaction |
| PASS Creating an element in the document of an iframe must not enqueue a custom element upgrade reaction if there is no matching definition |
| PASS Creating an element in the document of an iframe must enqueue a custom element upgrade reaction if there is a matching definition |
| PASS "define" in the document of an iframe must not enqueue a custom element upgrade reaction on a disconnected unresolved custom element |
| PASS Inserting an unresolved custom element into the document of an iframe must enqueue a custom element upgrade reaction |
| PASS "define" in the document of an iframe must enqueue a custom element upgrade reaction on a connected unresolved custom element |
| PASS Adopting (and leaving disconnceted) an unresolved custom element into the document of an iframe must not enqueue a custom element upgrade reaction |
| PASS Adopting and inserting an unresolved custom element into the document of an iframe must enqueue a custom element upgrade reaction |
| PASS If definition's disable shadow is true and element's shadow root is non-null, then throw a "NotSupportedError" DOMException. |
| PASS Infinite constructor recursion with upgrade(this) should not be possible |
| PASS Infinite constructor recursion with appendChild should not be possible |
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