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<!DOCTYPE html>
<meta name="author" title="Xiaocheng Hu" href="mailto:xiaochengh@chromium.org">
<meta name="assert" content="Custom element constructors can re-enter with different definitions">
<link rel="help" href="https://wicg.github.io/webcomponents/proposals/Scoped-Custom-Element-Registries">
<link rel="help" href="https://github.com/WICG/webcomponents/issues/969">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="testdiv"></div>
<script>
class TestAutonomous extends HTMLElement {};
class TestCustomizedBuiltIn extends HTMLParagraphElement {};
function attachShadowForTest(t, registry) {
const host = document.createElement('div');
const shadow = host.attachShadow({mode: 'open', registry});
document.body.appendChild(host);
t.add_cleanup(() => host.remove());
return shadow;
}
test(t => {
const registry = new CustomElementRegistry;
registry.define('test-element', TestAutonomous);
const shadow = attachShadowForTest(t, registry);
shadow.innerHTML = '<test-element></test-element>';
assert_true(shadow.firstChild instanceof TestAutonomous, 'target tree scope');
// Verify that it doesn't pollute other tree scopes.
const shadow2 = attachShadowForTest(t);
shadow2.innerHTML = '<test-element></test-element>';
assert_false(shadow2.firstChild instanceof TestAutonomous, 'tree scope without registry');
const shadow3 = attachShadowForTest(t, new CustomElementRegistry);
shadow3.innerHTML = '<test-element></test-element>';
assert_false(shadow3.firstChild instanceof TestAutonomous, 'tree scope with different registry');
t.add_cleanup(() => testdiv.firstChild.remove());
testdiv.innerHTML = '<test-element></test-element>';
assert_false(testdiv.firstChild instanceof TestAutonomous, 'main document');
}, 'Upgrade into autonomous custom element when inserted via innerHTML');
test(t => {
const registry = new CustomElementRegistry;
const shadow = attachShadowForTest(t, registry);
shadow.innerHTML = '<test-element></test-element>';
const shadow2 = attachShadowForTest(t);
shadow2.innerHTML = '<test-element></test-element>';
const shadow3 = attachShadowForTest(t, new CustomElementRegistry);
shadow3.innerHTML = '<test-element></test-element>';
t.add_cleanup(() => testdiv.firstChild.remove());
testdiv.innerHTML = '<test-element></test-element>';
registry.define('test-element', TestAutonomous);
// Elements in the target tree scope should be upgraded.
assert_true(shadow.firstChild instanceof TestAutonomous, 'target tree scope');
// Verify that it doesn't pollute other tree scopes.
assert_false(shadow2.firstChild instanceof TestAutonomous, 'tree scope without registry');
assert_false(shadow3.firstChild instanceof TestAutonomous, 'tree scope with different registry');
assert_false(testdiv.firstChild instanceof TestAutonomous, 'main document');
}, 'Upgrade into autonomous custom element when definition is added');
test(t => {
const registry = new CustomElementRegistry;
registry.define('test-element', TestCustomizedBuiltIn, {extends: 'p'});
const shadow = attachShadowForTest(t, registry);
shadow.innerHTML = '<p is="test-element"></p>';
assert_true(shadow.firstChild instanceof TestCustomizedBuiltIn, 'target tree scope');
// Verify that it doesn't pollute other tree scopes.
const shadow2 = attachShadowForTest(t);
shadow2.innerHTML = '<p is="test-element"></p>';
assert_false(shadow2.firstChild instanceof TestCustomizedBuiltIn, 'tree scope without registry');
const shadow3 = attachShadowForTest(t, new CustomElementRegistry);
shadow3.innerHTML = '<p is="test-element"></p>';
assert_false(shadow3.firstChild instanceof TestCustomizedBuiltIn, 'tree scope with different registry');
t.add_cleanup(() => testdiv.firstChild.remove());
testdiv.innerHTML = '<p is="test-element"></p>';
assert_false(testdiv.firstChild instanceof TestCustomizedBuiltIn, 'main document');
}, 'Upgrade into customized built-in element when inserted via innerHTML');
test(t => {
const registry = new CustomElementRegistry;
const shadow = attachShadowForTest(t, registry);
shadow.innerHTML = '<p is="test-element"></p>';
const shadow2 = attachShadowForTest(t);
shadow2.innerHTML = '<p is="test-element"></p>';
const shadow3 = attachShadowForTest(t, new CustomElementRegistry);
shadow3.innerHTML = '<p is="test-element"></p>';
t.add_cleanup(() => testdiv.firstChild.remove());
testdiv.innerHTML = '<p is="test-element"></p>';
registry.define('test-element', TestCustomizedBuiltIn, {extends: 'p'});
// Elements in the target tree scope should be upgraded.
assert_true(shadow.firstChild instanceof TestCustomizedBuiltIn, 'target tree scope');
// Verify that it doesn't pollute other tree scopes.
assert_false(shadow2.firstChild instanceof TestCustomizedBuiltIn, 'tree scope without registry');
assert_false(shadow3.firstChild instanceof TestCustomizedBuiltIn, 'tree scope with different registry');
assert_false(testdiv.firstChild instanceof TestCustomizedBuiltIn, 'main document');
}, 'Upgrade into customized built-in element when definition is added');
</script>
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