| <!DOCTYPE html> |
| <meta name="author" title="Xiaocheng Hu" href="mailto:xiaochengh@chromium.org"> |
| <meta name="assert" content="User code can attach CustomElementRegistry to ShadowRoot"> |
| <link rel="help" href="https://wicg.github.io/webcomponents/proposals/Scoped-Custom-Element-Registries"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <body> |
| <script> |
| function createShadowHost(testObject) { |
| let element = document.createElement('div'); |
| testObject.add_cleanup(() => element.remove()); |
| document.body.appendChild(element); |
| return element; |
| } |
| |
| test(function() { |
| let host = createShadowHost(this); |
| let shadow = host.attachShadow({mode: 'open'}); |
| assert_equals(shadow.registry, null); |
| }, 'ShadowRoot.registry is null if not explicitly specified'); |
| |
| test(function() { |
| let host = createShadowHost(this); |
| let shadow = host.attachShadow({mode: 'open', registry: window.customElements}); |
| assert_equals(shadow.registry, window.customElements); |
| }, 'Attach the global registry to a shadow root'); |
| |
| test(function() { |
| let host = createShadowHost(this); |
| let registry = new CustomElementRegistry(); |
| let shadow = host.attachShadow({mode: 'open', registry}); |
| assert_equals(shadow.registry, registry); |
| }, 'Attach a non-global registry to a shadow root'); |
| |
| test(function() { |
| let registry = new CustomElementRegistry(); |
| let host1 = createShadowHost(this); |
| let shadow1 = host1.attachShadow({mode: 'open', registry}); |
| let host2 = createShadowHost(this); |
| let shadow2 = host2.attachShadow({mode: 'open', registry}); |
| assert_equals(shadow1.registry, registry); |
| assert_equals(shadow2.registry, registry); |
| }, 'Attach the same registry to multiple shadow roots'); |
| |
| test(function() { |
| let host = createShadowHost(this); |
| let shadow = host.attachShadow({mode: 'open'}); |
| shadow.registry = new CustomElementRegistry(); |
| assert_equals(shadow.registry, null); |
| }, 'Attaching registry to shadow root can only be done during initialization'); |
| </script> |
| </body> |
