WPT
wpt / custom-elements / HTMLElement-constructor-customized-builtins.html
Spec: https://html.spec.whatwg.org/multipage/custom-elements.html ↗
Runs: Chrome 155.0.8039.0 (wpt@6ec9fd59f, 2026-09-03) | Firefox 157.0a1 (wpt@6ec9fd59f, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-795e1 (wpt@7e3d005d7, 2026-09-03) | Servo Servo 0.6 (wpt@09159dcb3, 2026-09-02) | Blitz 188486089 (wpt@a95401e4e, 2026-09-02)
View on the Blitz WPT dashboard | Open test on wpt.live | wpt.fyi
| Chrome | Firefox | Safari | Ladybird | Servo | Blitz | |
|---|---|---|---|---|---|---|
| Total | 0/2 | 2/2 | 0/2 | 2/2 | 2/2 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| HTMLElement constructor must not get .prototype until it finishes its extends sanity checks, calling proxy constructor directly | FAIL | PASS | FAIL | PASS | PASS | — |
| HTMLElement constructor must not get .prototype until it finishes its extends sanity checks, calling via Reflect | FAIL | PASS | FAIL | PASS | PASS | — |