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:
a50cb89 wpt: run reference-named files which are themselves tests (#836) (2026-09-03)
| Area | Interop Score | Tests | Test % | Subtests | Subtest % |
|---|---|---|---|---|---|
| Total | 30.10% | (362/1266) | 28.59% | (1296/4160) | 31.15% |
| animations | 4.60% | (14/309) | 4.53% | (15/340) | 4.41% |
| as-image | 0.00% | (0/1) | 0.00% | (0/1) | 0.00% |
| coordinate-systems | 13.60% | (3/23) | 13.04% | (5/37) | 13.51% |
| crashtests | 100.00% | (22/22) | 100.00% | (22/22) | 100.00% |
| embedded | 23.00% | (6/26) | 23.08% | (6/30) | 20.00% |
| extensibility | 33.00% | (8/25) | 32.00% | (9/28) | 32.14% |
| fonts | 0.00% | (0/4) | 0.00% | (0/4) | 0.00% |
| geometry | 34.90% | (28/85) | 32.94% | (154/595) | 25.88% |
| interact | 38.20% | (9/30) | 30.00% | (85/213) | 39.91% |
| layout | 33.30% | (4/12) | 33.33% | (4/12) | 33.33% |
| linking | 31.20% | (19/64) | 29.69% | (24/98) | 24.49% |
| painting | 53.90% | (76/154) | 49.35% | (371/748) | 49.60% |
| path | 17.10% | (10/65) | 15.38% | (239/499) | 47.90% |
| 100.00% | (1/1) | 100.00% | (1/1) | 100.00% | |
| pservers | 31.70% | (13/41) | 31.71% | (23/90) | 25.56% |
| render | 33.30% | (4/12) | 33.33% | (4/12) | 33.33% |
| scripted | 10.00% | (1/10) | 10.00% | (1/11) | 9.09% |
| shapes | 47.20% | (17/36) | 47.22% | (19/47) | 40.43% |
| struct | 24.60% | (16/68) | 23.53% | (23/112) | 20.54% |
| styling | 49.40% | (39/84) | 46.43% | (131/363) | 36.09% |
| svg-in-svg | 100.00% | (1/1) | 100.00% | (1/1) | 100.00% |
| text | 68.70% | (69/102) | 67.65% | (112/213) | 52.58% |
| top-level-document | 100.00% | (1/1) | 100.00% | (1/1) | 100.00% |
| types | 1.20% | (1/87) | 1.15% | (2/612) | 0.33% |
| Test | Subtests | Subtest % | Status |
|---|---|---|---|
| historical.html | (44/68) | 64.71% | FAIL |
| idlharness.window.html | (0/1) | 0.00% | FAIL |
| sniffing-content-type.html | (0/1) | 0.00% | FAIL |