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-nesting
| Area | Interop Score | Tests | Test % | Subtests | Subtest % |
|---|---|---|---|---|---|
| Total | 71.40% | (15/21) | 71.43% | (15/21) | 71.43% |
| Test | Subtests | Subtest % | Status |
|---|---|---|---|
| conditional-properties.html | (1/1) | 100.00% | PASS |
| conditional-rules.html | (1/1) | 100.00% | PASS |
| contextually-invalid-selectors-001.html | (1/1) | 100.00% | PASS |
| contextually-invalid-selectors-002.html | (1/1) | 100.00% | PASS |
| contextually-invalid-selectors-003.html | (1/1) | 100.00% | PASS |
| double-parent-pseudo-in-placeholder-crash.html | (1/1) | 100.00% | PASS |
| has-nesting.html | (0/1) | 0.00% | FAIL |
| host-nesting-001.html | (0/1) | 0.00% | FAIL |
| host-nesting-002.html | (0/1) | 0.00% | FAIL |
| host-nesting-003.html | (0/1) | 0.00% | FAIL |
| host-nesting-004.html | (0/1) | 0.00% | FAIL |
| host-nesting-005.html | (0/1) | 0.00% | FAIL |
| implicit-nesting.html | (1/1) | 100.00% | PASS |
| nest-containing-forgiving.html | (1/1) | 100.00% | PASS |
| nesting-basic.html | (1/1) | 100.00% | PASS |
| nesting-type-selector.html | (1/1) | 100.00% | PASS |
| parent-pseudo-in-placeholder-crash.html | (1/1) | 100.00% | PASS |
| pseudo-part-crash.html | (1/1) | 100.00% | PASS |
| pseudo-where-crash.html | (1/1) | 100.00% | PASS |
| supports-is-consistent.html | (1/1) | 100.00% | PASS |
| supports-rule.html | (1/1) | 100.00% | PASS |