3 files changed, 41 insertions, 11 deletions
diff --git a/components/script/dom/webidls/AbstractRange.webidl b/components/script/dom/webidls/AbstractRange.webidl
new file mode 100644
index 00000000000..4472d27fc20
--- /dev/null
+++ b/components/script/dom/webidls/AbstractRange.webidl
@@ -0,0 +1,21 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://dom.spec.whatwg.org/#interface-abstractrange
+ */
+
+[Exposed=Window]
+interface AbstractRange {
+  [Pure]
+  readonly attribute Node startContainer;
+  [Pure]
+  readonly attribute unsigned long startOffset;
+  [Pure]
+  readonly attribute Node endContainer;
+  [Pure]
+  readonly attribute unsigned long endOffset;
+  [Pure]
+  readonly attribute boolean collapsed;
+};
diff --git a/components/script/dom/webidls/Range.webidl b/components/script/dom/webidls/Range.webidl
index 037093a0762..7ba168ddb05 100644
--- a/components/script/dom/webidls/Range.webidl
+++ b/components/script/dom/webidls/Range.webidl
@@ -9,19 +9,9 @@
  */
 
 [Exposed=Window]
-interface Range {
+interface Range : AbstractRange {
   [Throws] constructor();
   [Pure]
-  readonly attribute Node startContainer;
-  [Pure]
-  readonly attribute unsigned long startOffset;
-  [Pure]
-  readonly attribute Node endContainer;
-  [Pure]
-  readonly attribute unsigned long endOffset;
-  [Pure]
-  readonly attribute boolean collapsed;
-  [Pure]
   readonly attribute Node commonAncestorContainer;
 
   [Throws]
diff --git a/components/script/dom/webidls/StaticRange.webidl b/components/script/dom/webidls/StaticRange.webidl
new file mode 100644
index 00000000000..a582afe3d7a
--- /dev/null
+++ b/components/script/dom/webidls/StaticRange.webidl
@@ -0,0 +1,19 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://dom.spec.whatwg.org/#interface-staticrange
+ */
+
+dictionary StaticRangeInit {
+  required Node startContainer;
+  required unsigned long startOffset;
+  required Node endContainer;
+  required unsigned long endOffset;
+};
+
+[Exposed=Window]
+interface StaticRange : AbstractRange {
+  [Throws] constructor(StaticRangeInit init);
+};