<!DOCTYPE html>
<meta name="author" title="Takayoshi Kochi" href="mailto:[email protected]">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id=log></div>
<div id="parent">
<template id="tmpl"><span>Happy Templating!</span></template>
</div>
<script>
test(() => {
var parent = document.getElementById('parent');
var tmpl = document.getElementById('tmpl');
assert_equals(tmpl.innerHTML, '<span>Happy Templating!</span>');
var span = tmpl.content.querySelector('span');
// Hierarchy checks at various combinations.
assert_throws_dom('HierarchyRequestError', () => {
tmpl.content.appendChild(parent);
}, 'Template content should throw if any of ancestor is being appended.');
assert_throws_dom('HierarchyRequestError', () => {
tmpl.content.appendChild(tmpl);
}, 'Template content should throw if its host is being appended.');
assert_throws_dom('HierarchyRequestError', () => {
span.appendChild(parent);
}, 'Template content child should throw if any of ancestor is being appended.');
assert_throws_dom('HierarchyRequestError', () => {
span.appendChild(tmpl);
}, 'Template content child should throw template\'s host is being appended.');
}, "Template content should throw when its ancestor is being appended.");
test(() => {
var parent = document.getElementById('parent');
var tmpl = document.getElementById('tmpl');
assert_equals(tmpl.innerHTML, '<span>Happy Templating!</span>');
var span = tmpl.content.querySelector('span');
var tmpl_doc = tmpl.content.ownerDocument;
assert_equals(tmpl.ownerDocument, document);
assert_not_equals(tmpl_doc, document);
var new_doc = document.implementation.createHTMLDocument();
assert_not_equals(new_doc, document);
assert_not_equals(new_doc, tmpl_doc);
// Try moving tmpl.content to new_doc and check the results.
const tmplContentNodeDocument = tmpl.content.ownerDocument;
const tmplContentAdoptResult = new_doc.adoptNode(tmpl.content);
assert_equals(tmpl.content, tmplContentAdoptResult);
assert_equals(tmpl.ownerDocument, document);
assert_equals(tmpl.content.ownerDocument, tmplContentNodeDocument);
// Hierarchy checks at various combinations.
assert_throws_dom('HierarchyRequestError', () => {
tmpl.content.appendChild(parent);
}, 'Template content should throw if any of ancestor is being appended.');
assert_throws_dom('HierarchyRequestError', () => {
tmpl.content.appendChild(tmpl);
}, 'Template content should throw if its host is being appended.');
assert_throws_dom('HierarchyRequestError', () => {
span.appendChild(parent);
}, 'Template content child should throw if any of ancestor is being appended.');
assert_throws_dom('HierarchyRequestError', () => {
span.appendChild(tmpl);
}, 'Template content child should throw template\'s host is being appended.');
// Sanity check: template.content before and after move.
var tmpl_content_reference = tmpl.content;
assert_equals(tmpl.content.firstChild, span,
'<span> should be kept until it is removed, even after ' +
'adopted to another document.');
new_doc.body.appendChild(tmpl.content);
assert_equals(tmpl.content.firstChild, null,
'<span> should be removed from template content.');
assert_equals(tmpl_content_reference, tmpl.content,
'template.content should be identical before and after ' +
'moving its children.');
}, 'Template content should throw exception when its ancestor in ' +
'a different document but connected via host is being append.');
</script>
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