diff --git a/interfaces/beacon.idl b/interfaces/beacon.idl
new file mode 100644
index 00000000000000..e974d55bb2f33f
--- /dev/null
+++ b/interfaces/beacon.idl
@@ -0,0 +1,4 @@
+
+  partial interface Navigator {
+      boolean sendBeacon(USVString url, optional BodyInit? data = null);
+  };