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-rw-r--r--components/script/dom/webidls/MessageEvent.webidl3
1 files changed, 2 insertions, 1 deletions
diff --git a/components/script/dom/webidls/MessageEvent.webidl b/components/script/dom/webidls/MessageEvent.webidl
index fc43c463743..e5b91a043f3 100644
--- a/components/script/dom/webidls/MessageEvent.webidl
+++ b/components/script/dom/webidls/MessageEvent.webidl
@@ -3,8 +3,9 @@
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
// https://html.spec.whatwg.org/multipage/#messageevent
-[Constructor(DOMString type, optional MessageEventInit eventInitDict = {}), Exposed=(Window,Worker)]
+[Exposed=(Window,Worker)]
interface MessageEvent : Event {
+ [Throws] constructor(DOMString type, optional MessageEventInit eventInitDict = {});
readonly attribute any data;
readonly attribute DOMString origin;
readonly attribute DOMString lastEventId;