Merge branch 'main' into 91-jsonschema-source-of-truth

Author: ddbeck

docs/guidelines.md

@@ -62,7 +62,7 @@ Feature authors should (in descending order of priority):
 
 A feature's identifier is the feature's filename before the `.yml` extension.
 
-Feature identifiers must contain only lowercase alphanumeric characters (a-z and 0-9) plus the `-` character (hyphen or minus sign) as a word separator.
+Feature identifiers must start with a lowercase alphabetic character (a-z) and contain only lowercase alphanumeric characters (a-z and 0-9) plus the `-` character (hyphen or minus sign) as a word separator.
 
 The identifier should match the name, with these additional guidelines:
 

features/composed-ranges.yml.dist

@@ -4,6 +4,9 @@
 status:
   baseline: false
   support:
+    chrome: "137"
+    chrome_android: "137"
+    edge: "137"
     safari: "17"
     safari_ios: "17"
 compat_features:

features/draft/spec/css-display-4.yml.dist

@@ -3,6 +3,9 @@
 
 status:
   baseline: false
-  support: {}
+  support:
+    chrome: "137"
+    chrome_android: "137"
+    edge: "137"
 compat_features:
   - css.properties.reading-order

features/draft/spec/css-values-5.yml.dist

@@ -3,6 +3,9 @@
 
 status:
   baseline: false
-  support: {}
+  support:
+    chrome: "137"
+    chrome_android: "137"
+    edge: "137"
 compat_features:
   - css.types.if

features/draft/spec/css-viewport-1.yml

@@ -0,0 +1,12 @@
+draft_date: 2025-05-31
+name: CSS Viewport Module Level 1
+description: TODO
+spec: https://drafts.csswg.org/css-viewport/
+compat_features:
+  - api.Viewport
+  - api.Viewport.segments
+  - api.Window.viewport
+
+# The following features in the spec are already part of web-features:
+# - zoom:
+#   - css.properties.zoom

features/draft/spec/css-viewport-1.yml.dist

@@ -0,0 +1,10 @@
+# Generated from: css-viewport-1.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support: {}
+compat_features:
+  - api.Viewport
+  - api.Viewport.segments
+  - api.Window.viewport

features/draft/spec/html.yml

@@ -1,4 +1,4 @@
-draft_date: 2025-05-19
+draft_date: 2025-05-31
 name: HTML
 description: TODO
 spec: https://html.spec.whatwg.org/multipage/
@@ -92,6 +92,7 @@ compat_features:
   - html.elements.form.autocomplete.new-password
   - html.elements.form.autocomplete.one-time-code
   - html.elements.form.autocomplete.webauthn
+  - html.elements.h1.no_ua_styles_in_article_aside_nav_section
   - html.elements.hr.hr_in_select
   - html.elements.html.xmlns
   - html.elements.iframe.allow.autoplay
@@ -100,7 +101,6 @@ compat_features:
   - html.elements.iframe.allow.wildcards
   - html.elements.iframe.sandbox.allow-orientation-lock
   - html.elements.iframe.sandbox.allow-pointer-lock
-  - html.elements.img.sizes.auto
   - html.elements.img.usemap.case_sensitive
   - html.elements.input.autocomplete
   - html.elements.link.rel.icon
@@ -125,7 +125,6 @@ compat_features:
   - http.headers.Origin-Agent-Cluster
   - http.headers.Permissions-Policy.autoplay
   - http.headers.Permissions-Policy.cross-origin-isolated
-  - http.headers.Permissions-Policy.document-domain
   - http.headers.Refresh
   - http.headers.X-Frame-Options
   - http.headers.X-Frame-Options.SAMEORIGIN
@@ -2323,6 +2322,8 @@ compat_features:
 # - aspect-ratio:
 #   - html.elements.img.aspect_ratio_computed_from_attributes
 #   - html.elements.video.aspect_ratio_computed_from_attributes
+# - <img sizes="auto" loading="lazy">:
+#   - html.elements.img.sizes.auto
 # - <input type="button">:
 #   - html.elements.input.type_button
 # - Email, telephone, and URL <input> types:

features/draft/spec/html.yml.dist

@@ -893,7 +893,6 @@ compat_features:
   #   chrome_android: "126"
   #   edge: "126"
   - api.HTMLImageElement.sizes.auto
-  - html.elements.img.sizes.auto
 
   # baseline: false
   # support:
@@ -918,6 +917,13 @@ compat_features:
   #   edge: "136"
   - api.OffscreenCanvasRenderingContext2D.lang
 
+  # baseline: false
+  # support:
+  #   chrome: "137"
+  #   chrome_android: "137"
+  #   edge: "137"
+  - api.ImageData.pixelFormat
+
   # baseline: false
   # support:
   #   safari: "9"
@@ -947,8 +953,7 @@ compat_features:
   # baseline: false
   # support: {}
   - api.HTMLButtonElement.command.request-close
-  - api.ImageData.pixelFormat
   - api.Navigator.authentication
+  - html.elements.h1.no_ua_styles_in_article_aside_nav_section
   - html.elements.hr.hr_in_select
   - html.elements.track.kind.descriptions
-  - http.headers.Permissions-Policy.document-domain

features/draft/spec/paint-timing.yml

@@ -0,0 +1,16 @@
+draft_date: 2025-05-31
+name: Paint Timing
+description: TODO
+spec: https://w3c.github.io/paint-timing/
+compat_features:
+  - api.LargestContentfulPaint.paintTime
+  - api.LargestContentfulPaint.presentationTime
+  - api.PerformancePaintTiming.paintTime
+  - api.PerformancePaintTiming.presentationTime
+  - api.PerformancePaintTiming.toJSON
+
+# The following features in the spec are already part of web-features:
+# - Paint timing:
+#   - api.PerformancePaintTiming
+#   - api.PerformancePaintTiming.first-contentful-paint
+#   - api.PerformancePaintTiming.first-paint

features/draft/spec/paint-timing.yml.dist

@@ -0,0 +1,12 @@
+# Generated from: paint-timing.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support: {}
+compat_features:
+  - api.LargestContentfulPaint.paintTime
+  - api.LargestContentfulPaint.presentationTime
+  - api.PerformancePaintTiming.paintTime
+  - api.PerformancePaintTiming.presentationTime
+  - api.PerformancePaintTiming.toJSON