Status
This page documents the implementation status of various HTML and CSS features in Blitz.
This page documents Blitz's scores on the "css" subsuite of the Web Platform Tests.
Note: As it does not have a JavaScript engine, Blitz can only run about 20% of the total subtests. In the numbers below, tests that Blitz can't run are ignored and percentages are relative to the number of tests run.
wpt / css / css-sizing / animation
Data from commit:
1884860 Copy-on-write style attribute blocks that are in the rule tree (#831) (2026-09-02)
| Area | Interop Score | Tests | Test % | Subtests | Subtest % |
|---|---|---|---|---|---|
| Total | 55.70% | (0/15) | 0.00% | (2257/3051) | 73.98% |
| Test | Subtests | Subtest % | Status |
|---|---|---|---|
| aspect-ratio-interpolation.html | (202/249) | 81.12% | FAIL |
| box-sizing-no-interpolation.html | (35/42) | 83.33% | FAIL |
| height-composition.html | (19/60) | 31.67% | FAIL |
| height-interpolation.html | (360/438) | 82.19% | FAIL |
| height-no-interpolation.html | (35/42) | 83.33% | FAIL |
| max-height-composition.html | (6/60) | 10.00% | FAIL |
| max-height-interpolation.html | (299/366) | 81.69% | FAIL |
| max-width-composition.html | (9/60) | 15.00% | FAIL |
| max-width-interpolation.html | (299/366) | 81.69% | FAIL |
| min-height-composition.html | (9/60) | 15.00% | FAIL |
| min-height-interpolation.html | (299/366) | 81.69% | FAIL |
| min-width-composition.html | (9/60) | 15.00% | FAIL |
| min-width-interpolation.html | (299/366) | 81.69% | FAIL |
| width-composition.html | (7/60) | 11.67% | FAIL |
| width-interpolation.html | (370/456) | 81.14% | FAIL |