{
"schemaVersion": "0",
"product": "omena-transform-target.native-stage2-coverage",
"bindingSource": "rust/crates/omena-transform-target/data/pass-feature-bindings.toml",
"selectionBasis": [
"native target pass has a generated cross-source support binding",
"PostCSS compatibility observations prioritize uncovered fallback families"
],
"stage1Fallback": {
"pluginId": "autoprefixer-legacy-browsers",
"policy": "uncoveredFeaturesRemainOnStage1"
},
"coveredFeatures": [
{
"featureId": "light-dark",
"category": "targetLowering",
"passIds": ["light-dark-lowering"],
"targetRule": "allResolvedTargetsMeet:light_dark",
"caniuseKeys": ["css-light-dark-function"],
"sourceKeys": {
"caniuse": "css-light-dark-function",
"web-features": "light-dark",
"mdn-bcd": "css.types.color.light-dark"
},
"status": "covered"
},
{
"featureId": "color-mix",
"category": "targetLowering",
"passIds": ["color-mix-lowering"],
"targetRule": "allResolvedTargetsMeet:color_mix",
"caniuseKeys": ["css-color-mix"],
"sourceKeys": {
"caniuse": "css-color-mix",
"web-features": "color-mix",
"mdn-bcd": "css.types.color.color-mix"
},
"status": "covered"
},
{
"featureId": "color-function",
"category": "targetLowering",
"passIds": ["color-function-lowering"],
"targetRule": "allResolvedTargetsMeet:color_function",
"caniuseKeys": ["css-color-function"],
"sourceKeys": {
"caniuse": "css-color-function",
"web-features": "color-function",
"mdn-bcd": "css.types.color.color"
},
"status": "covered"
},
{
"featureId": "relative-color",
"category": "targetLowering",
"passIds": ["relative-color-lowering"],
"targetRule": "allResolvedTargetsMeet:relative_color",
"caniuseKeys": ["css-relative-colors"],
"sourceKeys": {
"caniuse": "css-relative-colors",
"web-features": "relative-color",
"mdn-bcd": "css.types.color.rgb.relative_syntax"
},
"status": "covered"
},
{
"featureId": "css-nesting",
"category": "targetLowering",
"passIds": ["nesting-unwrap"],
"targetRule": "allResolvedTargetsMeet:css_nesting",
"caniuseKeys": ["css-nesting"],
"sourceKeys": {
"caniuse": "css-nesting",
"web-features": "nesting",
"mdn-bcd": "css.selectors.nesting"
},
"status": "covered"
},
{
"featureId": "cascade-layers",
"category": "targetLowering",
"passIds": ["layer-flatten"],
"targetRule": "allResolvedTargetsMeet:cascade_layers",
"caniuseKeys": ["css-cascade-layers"],
"sourceKeys": {
"caniuse": "css-cascade-layers",
"web-features": "cascade-layers",
"mdn-bcd": "css.at-rules.layer"
},
"status": "covered"
},
{
"featureId": "css-scope",
"category": "targetLowering",
"passIds": ["scope-flatten"],
"targetRule": "allResolvedTargetsMeet:css_scope",
"caniuseKeys": ["css-cascade-scope"],
"sourceKeys": {
"caniuse": "css-cascade-scope",
"web-features": "scope",
"mdn-bcd": "css.at-rules.scope"
},
"status": "covered"
},
{
"featureId": "flexbox",
"category": "vendorPrefixing",
"passIds": ["vendor-prefixing", "stale-prefix-removal"],
"targetRule": "allResolvedTargetsMeet:flexbox",
"caniuseKeys": ["flexbox"],
"sourceKeys": {
"caniuse": "flexbox",
"web-features": "flexbox",
"mdn-bcd": "css.properties.flex"
},
"status": "covered"
},
{
"featureId": "sticky-positioning",
"category": "vendorPrefixing",
"passIds": ["vendor-prefixing", "stale-prefix-removal"],
"targetRule": "allResolvedTargetsMeet:sticky_positioning",
"caniuseKeys": ["css-sticky"],
"sourceKeys": {
"caniuse": "css-sticky",
"web-features": "sticky-positioning",
"mdn-bcd": "css.properties.position.sticky"
},
"status": "covered"
},
{
"featureId": "oklch-oklab",
"category": "targetLowering",
"passIds": ["oklch-oklab-lowering"],
"targetRule": "allResolvedTargetsMeet:oklch_oklab",
"caniuseKeys": ["css-lch-lab"],
"sourceKeys": {
"caniuse": "css-lch-lab",
"web-features": "oklab",
"mdn-bcd": "css.types.color.oklch"
},
"status": "covered"
},
{
"featureId": "logical-properties",
"category": "targetLowering",
"passIds": ["logical-to-physical"],
"targetRule": "allResolvedTargetsMeet:logical_properties",
"caniuseKeys": ["css-logical-props"],
"sourceKeys": {
"caniuse": "css-logical-props",
"web-features": "logical-properties",
"mdn-bcd": "css.properties.margin-inline-start"
},
"status": "covered"
}
],
"uncoveredFeatures": [
{
"featureId": "vendor-prefixing.appearance",
"category": "vendorPrefixing",
"reason": "the native prefix matrix can emit appearance prefixes, but no dedicated target-data binding proves when each prefix is required",
"observedProperties": ["appearance"],
"fallback": "stage1"
},
{
"featureId": "vendor-prefixing.user-select",
"category": "vendorPrefixing",
"reason": "the native prefix matrix can emit user-select prefixes, but no dedicated target-data binding proves when each prefix is required",
"observedProperties": ["user-select"],
"fallback": "stage1"
},
{
"featureId": "vendor-prefixing.hyphens",
"category": "vendorPrefixing",
"reason": "the native prefix matrix does not emit the Firefox-specific hyphens declaration required by the compiled Stage-1 legacy target set",
"observedProperties": ["hyphens"],
"fallback": "stage1"
},
{
"featureId": "vendor-prefixing.placeholder-selector",
"category": "vendorPrefixing",
"reason": "selector-level placeholder prefixing is not represented by the native declaration-prefix pass",
"observedProperties": [],
"fallback": "stage1"
},
{
"featureId": "target-lowering.custom-media",
"category": "targetLowering",
"reason": "custom media expansion has no native target-managed pass",
"observedProperties": [],
"fallback": "stage1"
},
{
"featureId": "target-lowering.custom-selectors",
"category": "targetLowering",
"reason": "custom selector expansion has no native target-managed pass",
"observedProperties": [],
"fallback": "stage1"
}
]
}