WPT
This page compares scores on the Web Platform Tests across web engines, using the latest master runs from wpt.fyi and Blitz's own test runner.
wpt / custom-elements / reactions
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)
Sort areas: alphabetical | by subtest count
| Area | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| Total | 100.0%534/534 | 97.4%520/534 | 62.2%332/534 | 95.9%512/534 | 86.1%460/534 | 0.0%0/534 |
| customized-builtins | 100.0%203/203 | 100.0%203/203 | 0.5%1/203 | 100.0%203/203 | 76.4%155/203 | 0.0%0/203 |
| Test | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| Animation.html | 3/3 | 3/3 | 3/3 | 0/3 | 0/3 | NOT RUN |
| AriaMixin-element-attributes.html | 16/16 | 2/16 | 16/16 | 16/16 | 0/16 | NOT RUN |
| AriaMixin-string-attributes.html | 80/80 | 80/80 | 80/80 | 80/80 | 80/80 | NOT RUN |
| AriaMixin-string-attributes.tentative.html | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 | NOT RUN |
| Attr.html | 2/2 | 2/2 | 2/2 | 2/2 | 2/2 | NOT RUN |
| CSSStyleDeclaration.html | 30/30 | 30/30 | 30/30 | 30/30 | 30/30 | NOT RUN |
| ChildNode.html | 7/7 | 7/7 | 7/7 | 4/7 | 7/7 | NOT RUN |
| DOMStringMap.html | 8/8 | 8/8 | 8/8 | 4/8 | 8/8 | NOT RUN |
| DOMTokenList.html | 19/19 | 19/19 | 19/19 | 19/19 | 19/19 | NOT RUN |
| Document.html | 12/12 | 12/12 | 12/12 | 12/12 | 11/12 | NOT RUN |
| Element.html | 47/47 | 47/47 | 47/47 | 46/47 | 47/47 | NOT RUN |
| ElementContentEditable.html | 2/2 | 2/2 | 2/2 | 2/2 | 2/2 | NOT RUN |
| HTMLAnchorElement.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| HTMLElement.html | 22/22 | 22/22 | 22/22 | 22/22 | 16/22 | NOT RUN |
| HTMLOptionElement.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| HTMLOptionsCollection.html | 5/5 | 5/5 | 5/5 | 3/5 | 5/5 | NOT RUN |
| HTMLOutputElement.html | 2/2 | 2/2 | 2/2 | 2/2 | 2/2 | NOT RUN |
| HTMLSelectElement.html | 5/5 | 5/5 | 5/5 | 3/5 | 5/5 | NOT RUN |
| HTMLTableElement.html | 10/10 | 10/10 | 10/10 | 10/10 | 10/10 | NOT RUN |
| HTMLTableRowElement.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| HTMLTableSectionElement.html | 2/2 | 2/2 | 2/2 | 2/2 | 2/2 | NOT RUN |
| HTMLTitleElement.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| NamedNodeMap.html | 14/14 | 14/14 | 14/14 | 14/14 | 14/14 | NOT RUN |
| Node.html | 14/14 | 14/14 | 14/14 | 11/14 | 14/14 | NOT RUN |
| ParentNode.html | 4/4 | 4/4 | 4/4 | 2/4 | 4/4 | NOT RUN |
| Range.html | 10/10 | 10/10 | 10/10 | 8/10 | 10/10 | NOT RUN |
| Selection.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| ShadowRoot.html | 3/3 | 3/3 | 3/3 | 3/3 | 3/3 | NOT RUN |
| with-exceptions.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |