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 / parser
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%36/36 | 100.0%36/36 | 86.1%31/36 | 91.7%33/36 | 91.7%33/36 | 0.0%0/36 |
| Test | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| parser-constructs-custom-element-in-document-write.html | 2/2 | 2/2 | 2/2 | 2/2 | 2/2 | NOT RUN |
| parser-constructs-custom-element-synchronously.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| parser-constructs-custom-elements-with-is.html | 2/2 | 2/2 | 2/2 | 2/2 | 2/2 | NOT RUN |
| parser-constructs-custom-elements.html | 2/2 | 2/2 | 2/2 | 2/2 | 2/2 | NOT RUN |
| parser-custom-element-in-foreign-content.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| parser-fallsback-to-unknown-element.html | 4/4 | 4/4 | 4/4 | 4/4 | 4/4 | NOT RUN |
| parser-sets-attributes-and-children.html | 5/5 | 5/5 | 5/5 | 5/5 | 5/5 | NOT RUN |
| parser-uses-constructed-element.html | 2/2 | 2/2 | 2/2 | 2/2 | 2/2 | NOT RUN |
| parser-uses-create-an-element-for-a-token-svg.svg | 2/2 | 2/2 | 1/2 | 1/2 | 0/2 | NOT RUN |
| parser-uses-registry-of-owner-document.html | 10/10 | 10/10 | 10/10 | 10/10 | 9/10 | NOT RUN |
| serializing-html-fragments-customized-builtins.html | 3/3 | 3/3 | 1/3 | 3/3 | 3/3 | NOT RUN |
| xml-parser-custom-element-reparents-during-construction.xhtml | 2/2 | 2/2 | 0/2 | 0/2 | 2/2 | NOT RUN |
