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)
| Area | Interop Score | Tests | Test % | Subtests | Subtest % |
|---|---|---|---|---|---|
| Total | 29.80% | (32/164) | 19.51% | (330/1704) | 19.37% |
| abspos | 20.60% | (8/84) | 9.52% | (181/1105) | 16.38% |
| baseline-rules | 30.00% | (3/10) | 30.00% | (3/24) | 12.50% |
| blocks | 23.70% | (5/53) | 9.43% | (127/555) | 22.88% |
| content-distribution | 100.00% | (2/2) | 100.00% | (5/5) | 100.00% |
| distribution-values | 100.00% | (1/1) | 100.00% | (1/1) | 100.00% |
| gaps | 100.00% | (2/2) | 100.00% | (2/2) | 100.00% |
| self-alignment | 88.80% | (8/9) | 88.89% | (8/9) | 88.89% |
| Test | Subtests | Subtest % | Status |
|---|---|---|---|
| baseline-of-scrollable-1a.html | (1/1) | 100.00% | PASS |
| baseline-of-scrollable-1b.html | (1/1) | 100.00% | PASS |
| baseline-of-scrollable-2.html | (1/1) | 100.00% | PASS |