diff --git a/api/Document.json b/api/Document.json
index fb5c86d2ce688f..988b107a2309a5 100644
--- a/api/Document.json
+++ b/api/Document.json
@@ -1204,54 +1204,6 @@
           }
         }
       },
-      "contains": {
-        "__compat": {
-          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/contains",
-          "support": {
-            "chrome": {
-              "version_added": true
-            },
-            "chrome_android": {
-              "version_added": true
-            },
-            "edge": {
-              "version_added": "12"
-            },
-            "firefox": {
-              "version_added": "9"
-            },
-            "firefox_android": {
-              "version_added": "9"
-            },
-            "ie": {
-              "version_added": false
-            },
-            "opera": {
-              "version_added": null
-            },
-            "opera_android": {
-              "version_added": null
-            },
-            "safari": {
-              "version_added": null
-            },
-            "safari_ios": {
-              "version_added": null
-            },
-            "samsunginternet_android": {
-              "version_added": true
-            },
-            "webview_android": {
-              "version_added": true
-            }
-          },
-          "status": {
-            "experimental": false,
-            "standard_track": true,
-            "deprecated": false
-          }
-        }
-      },
       "contentType": {
         "__compat": {
           "mdn_url": "https://developer.mozilla.org/docs/Web/API/Document/contentType",
diff --git a/api/Node.json b/api/Node.json
index c8f61afb053092..f9015f6fdbe6da 100644
--- a/api/Node.json
+++ b/api/Node.json
@@ -437,7 +437,8 @@
             },
             "ie": {
               "version_added": "9",
-              "notes": "Only supports <code>contains</code> for HTML elements and not for SVG elements."
+              "partial_implementation": true,
+              "notes": "Only supported for <a href='https://developer.mozilla.org/docs/Web/API/HTMLElement'><code>HTMLElement</code></a>, not all <code>Node</code> objects."
             },
             "opera": {
               "version_added": "7"