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-masking
| Area | Interop Score | Tests | Test % | Subtests | Subtest % |
|---|---|---|---|---|---|
| Total | 42.60% | (160/375) | 42.67% | (160/375) | 42.67% |
| animations | 0.00% | (0/1) | 0.00% | (0/1) | 0.00% |
| clip | 35.70% | (10/28) | 35.71% | (10/28) | 35.71% |
| clip-path | 40.80% | (92/225) | 40.89% | (92/225) | 40.89% |
| clip-rule | 0.00% | (0/2) | 0.00% | (0/2) | 0.00% |
| crashtests | 100.00% | (1/1) | 100.00% | (1/1) | 100.00% |
| mask-image | 48.30% | (57/118) | 48.31% | (57/118) | 48.31% |