Test HTMLTemplateElement content ownerDocument On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS template.ownerDocument is document PASS template.content is content PASS templateContentOwnerDocument instanceof HTMLDocument is true PASS document is not templateContentOwnerDocument PASS template.content.firstChild.ownerDocument is templateContentOwnerDocument PASS innerTemplate.ownerDocument is templateContentOwnerDocument PASS innerTemplate.content.ownerDocument is templateContentOwnerDocument PASS innerTemplate.ownerDocument instanceof HTMLDocument is true PASS template2.ownerDocument is document PASS template2.content.ownerDocument is templateContentOwnerDocument PASS template3.ownerDocument is document PASS template3.content.ownerDocument is templateContentOwnerDocument PASS template3.content.firstChild.ownerDocument is templateContentOwnerDocument PASS successfullyParsed is true TEST COMPLETE