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.
Data from commit:
1093b86 wpt: skip non-UTF-8 test files instead of crashing (#659) (2026-08-09)
wpt / css / css-transforms
| Area | Interop Score | Tests | Test % | Subtests | Subtest % |
|---|---|---|---|---|---|
| Total | 51.70% | (414/800) | 51.75% | (414/800) | 51.75% |
| animation | 66.60% | (18/27) | 66.67% | (18/27) | 66.67% |
| crashtests | 100.00% | (16/16) | 100.00% | (16/16) | 100.00% |
| document-styles | 64.20% | (9/14) | 64.29% | (9/14) | 64.29% |
| external-styles | 61.50% | (8/13) | 61.54% | (8/13) | 61.54% |
| gradientTransform | 66.60% | (2/3) | 66.67% | (2/3) | 66.67% |
| group | 77.50% | (31/40) | 77.50% | (31/40) | 77.50% |
| individual-transform | 16.60% | (3/18) | 16.67% | (3/18) | 16.67% |
| inline-styles | 35.70% | (5/14) | 35.71% | (5/14) | 35.71% |
| matrix | 0.00% | (0/69) | 0.00% | (0/69) | 0.00% |
| patternTransform | 0.00% | (0/2) | 0.00% | (0/2) | 0.00% |
| rotate | 92.80% | (13/14) | 92.86% | (13/14) | 92.86% |
| scale | 87.50% | (14/16) | 87.50% | (14/16) | 87.50% |
| skewX | 28.50% | (2/7) | 28.57% | (2/7) | 28.57% |
| skewY | 16.60% | (1/6) | 16.67% | (1/6) | 16.67% |
| transform-box | 11.70% | (4/34) | 11.76% | (4/34) | 11.76% |
| transform-list-separation | 100.00% | (11/11) | 100.00% | (11/11) | 100.00% |
| transform-origin | 38.20% | (31/81) | 38.27% | (31/81) | 38.27% |
| translate | 78.90% | (15/19) | 78.95% | (15/19) | 78.95% |