WPT
wpt / custom-elements / reactions / DOMStringMap.html
Spec: https://html.spec.whatwg.org/multipage/custom-elements.html ↗
Runs: Chrome 155.0.8039.0 (wpt@508cc6a62, 2026-09-03) | Firefox 157.0a1 (wpt@508cc6a62, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-56c61 (wpt@8fdda8ce4, 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 | 8/8 | 8/8 | 8/8 | 4/8 | 8/8 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| setter on DOMStringMap must enqueue an attributeChanged reaction when adding an observed data attribute | PASS | PASS | PASS | FAIL | PASS | — |
| setter on DOMStringMap must not enqueue an attributeChanged reaction when adding an unobserved data attribute | PASS | PASS | PASS | PASS | PASS | — |
| setter on DOMStringMap must enqueue an attributeChanged reaction when mutating the value of an observed data attribute | PASS | PASS | PASS | FAIL | PASS | — |
| setter on DOMStringMap must enqueue an attributeChanged reaction when mutating the value of an observed data attribute to the same value | PASS | PASS | PASS | FAIL | PASS | — |
| setter on DOMStringMap must not enqueue an attributeChanged reaction when mutating the value of an unobserved data attribute | PASS | PASS | PASS | PASS | PASS | — |
| deleter on DOMStringMap must enqueue an attributeChanged reaction when removing an observed data attribute | PASS | PASS | PASS | FAIL | PASS | — |
| deleter on DOMStringMap must not enqueue an attributeChanged reaction when removing an unobserved data attribute | PASS | PASS | PASS | PASS | PASS | — |
| deleter on DOMStringMap must not enqueue an attributeChanged reaction when it does not remove a data attribute | PASS | PASS | PASS | PASS | PASS | — |