diff --git a/dom/svg/SVGCircleElement.cpp b/dom/svg/SVGCircleElement.cpp
index 014de7545b6f..b16d74231e17 100644
--- a/dom/svg/SVGCircleElement.cpp
+++ b/dom/svg/SVGCircleElement.cpp
@@ -37,6 +37,11 @@ SVGCircleElement::SVGCircleElement(
     already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
     : SVGCircleElementBase(std::move(aNodeInfo)) {}
 
+bool SVGCircleElement::IsAttributeMapped(const nsAtom* aAttribute) const {
+  return IsInLengthInfo(aAttribute, sLengthInfo) ||
+         SVGCircleElementBase::IsAttributeMapped(aAttribute);
+}
+
 //----------------------------------------------------------------------
 // nsINode methods
 
diff --git a/dom/svg/SVGCircleElement.h b/dom/svg/SVGCircleElement.h
index b0be1f8e021d..066dede13679 100644
--- a/dom/svg/SVGCircleElement.h
+++ b/dom/svg/SVGCircleElement.h
@@ -29,6 +29,8 @@ class SVGCircleElement final : public SVGCircleElementBase {
       already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
 
  public:
+  NS_IMETHOD_(bool) IsAttributeMapped(const nsAtom* aAttribute) const override;
+
   // nsSVGSVGElement methods:
   virtual bool HasValidDimensions() const override;
 
diff --git a/dom/svg/SVGEllipseElement.cpp b/dom/svg/SVGEllipseElement.cpp
index ef88e78566c0..dee02797c169 100644
--- a/dom/svg/SVGEllipseElement.cpp
+++ b/dom/svg/SVGEllipseElement.cpp
@@ -41,6 +41,11 @@ SVGEllipseElement::SVGEllipseElement(
     already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
     : SVGEllipseElementBase(std::move(aNodeInfo)) {}
 
+bool SVGEllipseElement::IsAttributeMapped(const nsAtom* aAttribute) const {
+  return IsInLengthInfo(aAttribute, sLengthInfo) ||
+         SVGEllipseElementBase::IsAttributeMapped(aAttribute);
+}
+
 //----------------------------------------------------------------------
 // nsINode methods
 
diff --git a/dom/svg/SVGEllipseElement.h b/dom/svg/SVGEllipseElement.h
index 26601919c29b..f58e4f09f082 100644
--- a/dom/svg/SVGEllipseElement.h
+++ b/dom/svg/SVGEllipseElement.h
@@ -29,6 +29,8 @@ class SVGEllipseElement final : public SVGEllipseElementBase {
       already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
 
  public:
+  NS_IMETHOD_(bool) IsAttributeMapped(const nsAtom* aAttribute) const override;
+
   // nsSVGSVGElement methods:
   virtual bool HasValidDimensions() const override;
 
diff --git a/dom/svg/SVGForeignObjectElement.cpp b/dom/svg/SVGForeignObjectElement.cpp
index d52fb5f318da..399179871452 100644
--- a/dom/svg/SVGForeignObjectElement.cpp
+++ b/dom/svg/SVGForeignObjectElement.cpp
@@ -109,7 +109,8 @@ SVGForeignObjectElement::IsAttributeMapped(const nsAtom* name) const {
                                                     sTextContentElementsMap,
                                                     sViewportsMap};
 
-  return FindAttributeDependence(name, map) ||
+  return IsInLengthInfo(name, sLengthInfo) ||
+         FindAttributeDependence(name, map) ||
          SVGGraphicsElement::IsAttributeMapped(name);
 }
 
diff --git a/dom/svg/SVGGraphicsElement.h b/dom/svg/SVGGraphicsElement.h
index 19399e8ef6a6..4ff220a702a3 100644
--- a/dom/svg/SVGGraphicsElement.h
+++ b/dom/svg/SVGGraphicsElement.h
@@ -32,6 +32,16 @@ class SVGGraphicsElement : public SVGGraphicsElementBase, public SVGTests {
   // returns true if focusability has been definitively determined otherwise
   // false
   bool IsSVGFocusable(bool* aIsFocusable, int32_t* aTabIndex);
+
+  template <typename T>
+  bool IsInLengthInfo(const nsAtom* aAttribute, const T& aLengthInfos) const {
+    for (auto const& e : aLengthInfos) {
+      if (e.mName == aAttribute) {
+        return true;
+      }
+    }
+    return false;
+  }
 };
 
 }  // namespace dom
diff --git a/dom/svg/SVGImageElement.cpp b/dom/svg/SVGImageElement.cpp
index 0bbab6cb3049..9c939c337e1f 100644
--- a/dom/svg/SVGImageElement.cpp
+++ b/dom/svg/SVGImageElement.cpp
@@ -218,7 +218,8 @@ SVGImageElement::IsAttributeMapped(const nsAtom* name) const {
       sViewportsMap,
   };
 
-  return FindAttributeDependence(name, map) ||
+  return IsInLengthInfo(name, sLengthInfo) ||
+         FindAttributeDependence(name, map) ||
          SVGImageElementBase::IsAttributeMapped(name);
 }
 
diff --git a/dom/svg/SVGRectElement.cpp b/dom/svg/SVGRectElement.cpp
index 3f1da44b66df..c4b26bff1311 100644
--- a/dom/svg/SVGRectElement.cpp
+++ b/dom/svg/SVGRectElement.cpp
@@ -49,6 +49,11 @@ SVGRectElement::SVGRectElement(
     already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
     : SVGRectElementBase(std::move(aNodeInfo)) {}
 
+bool SVGRectElement::IsAttributeMapped(const nsAtom* aAttribute) const {
+  return IsInLengthInfo(aAttribute, sLengthInfo) ||
+         SVGRectElementBase::IsAttributeMapped(aAttribute);
+}
+
 //----------------------------------------------------------------------
 // nsINode methods
 
diff --git a/dom/svg/SVGRectElement.h b/dom/svg/SVGRectElement.h
index 0a395f69c8fd..a22caac7fd53 100644
--- a/dom/svg/SVGRectElement.h
+++ b/dom/svg/SVGRectElement.h
@@ -28,6 +28,8 @@ class SVGRectElement final : public SVGRectElementBase {
       already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
 
  public:
+  NS_IMETHOD_(bool) IsAttributeMapped(const nsAtom* aAttribute) const override;
+
   // nsSVGSVGElement methods:
   virtual bool HasValidDimensions() const override;