From bc8ae92999f9db3770fc3e37d064785ea45bf46e Mon Sep 17 00:00:00 2001
From: "Daniel D. Beck" <daniel@ddbeck.com>
Date: Tue, 25 Nov 2025 15:27:31 +0100
Subject: [PATCH] Add data for anchor position container queries

---
 css/at-rules/container.json        | 96 ++++++++++++++++++++++++++++++
 css/properties/container-type.json | 31 ++++++++++
 2 files changed, 127 insertions(+)

diff --git a/css/at-rules/container.json b/css/at-rules/container.json
index c28931372474f5..f289427c585338 100644
--- a/css/at-rules/container.json
+++ b/css/at-rules/container.json
@@ -36,6 +36,102 @@
             "deprecated": false
           }
         },
+        "anchor_position_queries": {
+          "__compat": {
+            "description": "Anchor position queries (`anchored()`)",
+            "spec_url": "https://drafts.csswg.org/css-anchor-position-2/#anchored-container-queries",
+            "support": {
+              "chrome": {
+                "version_added": "143"
+              },
+              "chrome_android": "mirror",
+              "edge": "mirror",
+              "firefox": {
+                "version_added": false
+              },
+              "firefox_android": "mirror",
+              "oculus": "mirror",
+              "opera": "mirror",
+              "opera_android": "mirror",
+              "safari": {
+                "version_added": false
+              },
+              "safari_ios": "mirror",
+              "samsunginternet_android": "mirror",
+              "webview_android": "mirror",
+              "webview_ios": "mirror"
+            },
+            "status": {
+              "experimental": true,
+              "standard_track": true,
+              "deprecated": false
+            }
+          },
+          "fallback": {
+            "__compat": {
+              "description": "`fallback` container feature",
+              "spec_url": "https://drafts.csswg.org/css-anchor-position-2/#anchored",
+              "support": {
+                "chrome": {
+                  "version_added": "143"
+                },
+                "chrome_android": "mirror",
+                "edge": "mirror",
+                "firefox": {
+                  "version_added": false
+                },
+                "firefox_android": "mirror",
+                "oculus": "mirror",
+                "opera": "mirror",
+                "opera_android": "mirror",
+                "safari": {
+                  "version_added": false
+                },
+                "safari_ios": "mirror",
+                "samsunginternet_android": "mirror",
+                "webview_android": "mirror",
+                "webview_ios": "mirror"
+              },
+              "status": {
+                "experimental": true,
+                "standard_track": true,
+                "deprecated": false
+              }
+            },
+            "any": {
+              "__compat": {
+                "description": "`fallback` container feature",
+                "spec_url": "https://drafts.csswg.org/css-anchor-position-2/#anchored",
+                "support": {
+                  "chrome": {
+                    "version_added": "143"
+                  },
+                  "chrome_android": "mirror",
+                  "edge": "mirror",
+                  "firefox": {
+                    "version_added": false
+                  },
+                  "firefox_android": "mirror",
+                  "oculus": "mirror",
+                  "opera": "mirror",
+                  "opera_android": "mirror",
+                  "safari": {
+                    "version_added": false
+                  },
+                  "safari_ios": "mirror",
+                  "samsunginternet_android": "mirror",
+                  "webview_android": "mirror",
+                  "webview_ios": "mirror"
+                },
+                "status": {
+                  "experimental": true,
+                  "standard_track": true,
+                  "deprecated": false
+                }
+              }
+            }
+          }
+        },
         "scroll-state_queries": {
           "__compat": {
             "description": "Scroll-state queries",
diff --git a/css/properties/container-type.json b/css/properties/container-type.json
index 61fdf1d2698799..167f8af6f7a631 100644
--- a/css/properties/container-type.json
+++ b/css/properties/container-type.json
@@ -35,6 +35,37 @@
             "deprecated": false
           }
         },
+        "anchored": {
+          "__compat": {
+            "spec_url": "https://drafts.csswg.org/css-anchor-position-2/#container-type-anchored",
+            "support": {
+              "chrome": {
+                "version_added": "143"
+              },
+              "chrome_android": "mirror",
+              "edge": "mirror",
+              "firefox": {
+                "version_added": false
+              },
+              "firefox_android": "mirror",
+              "oculus": "mirror",
+              "opera": "mirror",
+              "opera_android": "mirror",
+              "safari": {
+                "version_added": false
+              },
+              "safari_ios": "mirror",
+              "samsunginternet_android": "mirror",
+              "webview_android": "mirror",
+              "webview_ios": "mirror"
+            },
+            "status": {
+              "experimental": true,
+              "standard_track": true,
+              "deprecated": false
+            }
+          }
+        },
         "inline-size": {
           "__compat": {
             "spec_url": "https://drafts.csswg.org/css-conditional-5/#valdef-container-type-inline-size",