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| FAIL Successful attachInternals() and the second call. element.attachInternals is not a function. (In 'element.attachInternals()', 'element.attachInternals' is undefined) |
| FAIL attachInternals() throws a NotSupportedError if it is called for a customized built-in element assert_throws_dom: function "() => { customizedBuiltin.attachInternals() }" threw object "TypeError: customizedBuiltin.attachInternals is not a function. (In 'customizedBuiltin.attachInternals()', 'customizedBuiltin.attachInternals' is undefined)" that is not a DOMException NotSupportedError: property "code" is equal to undefined, expected 9 |
| FAIL If a custom element definition for the local name of the element doesn't exist, throw an NotSupportedError assert_throws_dom: function "() => { builtin.attachInternals() }" threw object "TypeError: builtin.attachInternals is not a function. (In 'builtin.attachInternals()', 'builtin.attachInternals' is undefined)" that is not a DOMException NotSupportedError: property "code" is equal to undefined, expected 9 |
| FAIL If a custom element definition for the local name of the element has disable internals flag, throw a NotSupportedError assert_throws_dom: function "() => { |
| (new MyElement2).attachInternals(); |
| }" threw object "TypeError: (new MyElement2).attachInternals is not a function. (In '(new MyElement2).attachInternals()', '(new MyElement2).attachInternals' is undefined)" that is not a DOMException NotSupportedError: property "code" is equal to undefined, expected 9 |
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