WPT
wpt / performance-timeline / po-observe-type.any.html
Spec: Performance Timeline ↗
Runs: Chrome 155.0.8039.0 (wpt@2b4dfe72c, 2026-09-03) | Firefox 157.0a1 (wpt@2b4dfe72c, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-56c61 (wpt@ed1909ed6, 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 | 6/6 | 6/6 | 6/6 | 6/6 | 4/6 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| Calling observe() without 'type' or 'entryTypes' throws a TypeError | PASS | PASS | PASS | PASS | FAIL | — |
| Calling observe() with entryTypes and then type should throw an InvalidModificationError | PASS | PASS | PASS | PASS | PASS | — |
| Calling observe() with type and then entryTypes should throw an InvalidModificationError | PASS | PASS | PASS | PASS | PASS | — |
| Calling observe() with type and entryTypes should throw a TypeError | PASS | PASS | PASS | PASS | FAIL | — |
| Passing in unknown values to type does throw an exception. | PASS | PASS | PASS | PASS | PASS | — |
| observe() with different type values stacks. | PASS | PASS | PASS | PASS | PASS | — |