CustomElementRegistry-multi-register.html (1229B)
1 <!DOCTYPE html> 2 <meta name="author" title="Xiaocheng Hu" href="mailto:xiaochengh@chromium.org"> 3 <meta name="assert" content="The same constructor can be registered to multiple registries"> 4 <link rel="help" href="https://wicg.github.io/webcomponents/proposals/Scoped-Custom-Element-Registries"> 5 <script src="/resources/testharness.js"></script> 6 <script src="/resources/testharnessreport.js"></script> 7 <script> 8 class MyCustom extends HTMLElement {}; 9 10 test(() => { 11 let registry1 = new CustomElementRegistry(); 12 let registry2 = new CustomElementRegistry(); 13 window.customElements.define('my-custom', MyCustom); 14 registry1.define('my-custom', MyCustom); 15 registry2.define('my-custom', MyCustom); 16 17 assert_equals(window.customElements.get('my-custom'), MyCustom); 18 assert_equals(registry1.get('my-custom'), MyCustom); 19 assert_equals(registry2.get('my-custom'), MyCustom); 20 }, 'Same constructor can be registered to different registries'); 21 22 test(() => { 23 let registry = new CustomElementRegistry(); 24 registry.define('custom-a', MyCustom); 25 assert_throws_dom('NotSupportedError', () => registry.define('custom-b', MyCustom)); 26 }, 'Non-global registries still reject duplicate registrations of the same constructor'); 27 </script>