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| PASS HTMLElement constructor must throw a TypeError when NewTarget is equal to itself |
| PASS HTMLElement constructor must throw a TypeError when NewTarget is equal to itself via a Proxy object |
| PASS HTMLElement constructor must throw TypeError when it has not been defined by customElements.define |
| PASS Custom element constructor must throw TypeError when it does not extend HTMLElement |
| PASS Custom element constructor must throw TypeError when it does not extend the proper element interface |
| PASS HTMLElement constructor must infer the tag name from the element interface |
| PASS HTMLElement constructor must allow subclassing a custom element |
| PASS HTMLElement constructor must allow subclassing an user-defined subclass of HTMLElement |
| PASS HTMLElement constructor must only get .prototype once, calling proxy constructor directly |
| PASS HTMLElement constructor must only get .prototype once, calling proxy constructor via Reflect |
| PASS HTMLElement constructor must only get .prototype once, calling proxy constructor via Reflect with no inheritance |
| FAIL HTMLElement constructor must not get .prototype until it finishes its extends sanity checks, calling proxy constructor directly assert_throws: Should not be able to construct an HTMLElement named 'button' function "function () { new countingProxy() }" did not throw |
| FAIL HTMLElement constructor must not get .prototype until it finishes its extends sanity checks, calling via Reflect assert_throws: Should not be able to construct an HTMLElement named 'button' function "function () { Reflect.construct(HTMLElement, [], countingProxy) }" did not throw |
| PASS HTMLElement constructor must not get .prototype until it finishes its registration sanity checks, calling proxy constructor directly |
| PASS HTMLElement constructor must not get .prototype until it finishes its registration sanity checks, calling via Reflect |
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