From 0cea94242a555b7a8a2d956412da809a514814f7 Mon Sep 17 00:00:00 2001
From: Gaming4JC <g4jc@hyperbola.info>
Date: Sat, 25 Jan 2020 09:05:21 -0500
Subject: Bug 1430034 - Fix attributeChangedCallback isn't fired with correct
 newValue when the attribute value is an empty string;

Tag UXP Issue #1344
---
 dom/base/CustomElementRegistry.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'dom')

diff --git a/dom/base/CustomElementRegistry.cpp b/dom/base/CustomElementRegistry.cpp
index 4fb18381f..47601aabb 100644
--- a/dom/base/CustomElementRegistry.cpp
+++ b/dom/base/CustomElementRegistry.cpp
@@ -909,7 +909,7 @@ CustomElementRegistry::Upgrade(Element* aElement,
         LifecycleCallbackArgs args = {
           nsDependentAtomString(attrName),
           NullString(),
-          (attrValue.IsEmpty() ? NullString() : attrValue),
+          attrValue,
           (namespaceURI.IsEmpty() ? NullString() : namespaceURI)
         };
         nsContentUtils::EnqueueLifecycleCallback(nsIDocument::eAttributeChanged,
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