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-grid / grid-lanes
| Area | Interop Score | Tests | Test % | Subtests | Subtest % |
|---|---|---|---|---|---|
| Total | 13.70% | (115/840) | 13.69% | (119/1131) | 10.52% |
| abspos | 23.00% | (3/13) | 23.08% | (3/13) | 23.08% |
| alignment | 0.00% | (0/124) | 0.00% | (0/124) | 0.00% |
| animation | 100.00% | (2/2) | 100.00% | (2/2) | 100.00% |
| baseline | 0.00% | (0/40) | 0.00% | (0/40) | 0.00% |
| gap | 0.00% | (0/6) | 0.00% | (0/6) | 0.00% |
| grid-placement | 0.00% | (0/14) | 0.00% | (0/14) | 0.00% |
| intrinsic-sizing | 4.40% | (3/68) | 4.41% | (3/74) | 4.05% |
| invalidation | 0.00% | (0/3) | 0.00% | (0/3) | 0.00% |
| item-placement | 4.40% | (3/67) | 4.48% | (3/67) | 4.48% |
| items | 8.00% | (2/25) | 8.00% | (2/246) | 0.81% |
| order | 0.00% | (0/11) | 0.00% | (0/11) | 0.00% |
| overflow | 86.60% | (13/15) | 86.67% | (13/15) | 86.67% |
| subgrid | 26.90% | (58/215) | 26.98% | (58/215) | 26.98% |
| tentative | 2.00% | (1/48) | 2.08% | (1/48) | 2.08% |
| track-sizing | 12.30% | (22/178) | 12.36% | (22/237) | 9.28% |
| Test | Subtests | Subtest % | Status |
|---|---|---|---|
| column-empty-grid-lanes-container-001.html | (1/1) | 100.00% | PASS |
| column-empty-grid-lanes-container-002.html | (1/1) | 100.00% | PASS |
| column-empty-grid-lanes-container-content-editable-001.html | (1/1) | 100.00% | PASS |
| grid-lanes-columns-item-containing-block-is-grid-content-width.html | (1/1) | 100.00% | PASS |
| grid-lanes-container-minimum-size-single-axis-scroll-container.html | (4/6) | 66.67% | FAIL |
| grid-lanes-fieldset-crash.html | (1/1) | 100.00% | PASS |
| grid-lanes-not-inhibited-001.html | (0/1) | 0.00% | FAIL |
| row-empty-grid-lanes-container-001.html | (1/1) | 100.00% | PASS |
| row-empty-grid-lanes-container-002.html | (1/1) | 100.00% | PASS |
| row-empty-grid-lanes-container-content-editable-001.html | (1/1) | 100.00% | PASS |
| row-min-max-content-container.html | (0/1) | 0.00% | FAIL |