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-rw-r--r--dom/webidl/WebComponents.webidl5
1 files changed, 4 insertions, 1 deletions
diff --git a/dom/webidl/WebComponents.webidl b/dom/webidl/WebComponents.webidl
index 3dfb960bc..19ca38c0d 100644
--- a/dom/webidl/WebComponents.webidl
+++ b/dom/webidl/WebComponents.webidl
@@ -13,7 +13,10 @@
callback LifecycleCreatedCallback = void();
callback LifecycleAttachedCallback = void();
callback LifecycleDetachedCallback = void();
-callback LifecycleAttributeChangedCallback = void(DOMString attrName, DOMString? oldValue, DOMString? newValue);
+callback LifecycleAttributeChangedCallback = void(DOMString attrName,
+ DOMString? oldValue,
+ DOMString? newValue,
+ DOMString? namespaceURI);
dictionary LifecycleCallbacks {
LifecycleCreatedCallback? createdCallback;