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:
708eb61 WPT runner: support mismatch reftests and multiple rel=match links (#665) (2026-08-09)
wpt / css / css-backgrounds / animations / invalidation
| Area | Interop Score | Tests | Test % | Subtests | Subtest % |
|---|---|---|---|---|---|
| Total | 25.00% | (1/4) | 25.00% | (1/4) | 25.00% |
| Test | Subtests | Subtest % | Status |
|---|---|---|---|
| background-color-animation-with-zero-alpha.html | (1/1) | 100.00% | PASS |
| background-color-transition-obscured.html | (0/1) | 0.00% | FAIL |
| background-color-transition-with-delay.html | (0/1) | 0.00% | FAIL |
| background-color-transition-with-initially-transparent.html | (0/1) | 0.00% | FAIL |