diff --git a/api/HTMLScriptElement.json b/api/HTMLScriptElement.json
index 8f8559ab4a401..5fa844a02f9aa 100644
--- a/api/HTMLScriptElement.json
+++ b/api/HTMLScriptElement.json
@@ -80,6 +80,39 @@
           }
         }
       },
+      "blocking": {
+        "__compat": {
+          "spec_url": "https://html.spec.whatwg.org/multipage/semantics.html#attr-script-blocking",
+          "support": {
+            "chrome": {
+              "version_added": "105"
+            },
+            "chrome_android": "mirror",
+            "edge": "mirror",
+            "firefox": {
+              "version_added": false
+            },
+            "firefox_android": "mirror",
+            "ie": {
+              "version_added": false
+            },
+            "oculus": "mirror",
+            "opera": "mirror",
+            "opera_android": "mirror",
+            "safari": {
+              "version_added": false
+            },
+            "safari_ios": "mirror",
+            "samsunginternet_android": "mirror",
+            "webview_android": "mirror"
+          },
+          "status": {
+            "experimental": true,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      },
       "charset": {
         "__compat": {
           "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#dom-script-charset",