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-borders
| Area | Interop Score | Tests | Test % | Subtests | Subtest % |
|---|---|---|---|---|---|
| Total | 27.00% | (23/85) | 27.06% | (23/85) | 27.06% |
| border-shape | 25.00% | (12/48) | 25.00% | (12/48) | 25.00% |
| corner-shape | 21.40% | (6/28) | 21.43% | (6/28) | 21.43% |
| tentative | 0.00% | (0/2) | 0.00% | (0/2) | 0.00% |
| Test | Subtests | Subtest % | Status |
|---|---|---|---|
| border-radius-currentcolor.html | (1/1) | 100.00% | PASS |
| border-radius-greater-than-width.html | (0/1) | 0.00% | FAIL |
| border-shape-absolute-coords-shape.tentative.html | (0/1) | 0.00% | FAIL |
| borders-on-sub-unit-sized-elements.html | (1/1) | 100.00% | PASS |
| subpixel-border-width.tentative.html | (1/1) | 100.00% | PASS |
| subpixel-borders-with-child-border-box-sizing.html | (1/1) | 100.00% | PASS |
| subpixel-borders-with-child.html | (1/1) | 100.00% | PASS |