Add m-esr52 at 52.6.0

1 files changed, 17 insertions, 0 deletions

diff --git a/js/src/builtin/Classes.js b/js/src/builtin/Classes.js
new file mode 100644
index 000000000..d0f20b5fd
--- /dev/null
+++ b/js/src/builtin/Classes.js
@@ -0,0 +1,17 @@
+// Give a builtin constructor that we can use as the default. When we give
+// it to our newly made class, we will be sure to set it up with the correct name
+// and .prototype, so that everything works properly.
+
+var DefaultDerivedClassConstructor =
+    class extends null {
+        constructor(...args) {
+            super(...allowContentSpread(args));
+        }
+    };
+MakeDefaultConstructor(DefaultDerivedClassConstructor);
+
+var DefaultBaseClassConstructor =
+    class {
+        constructor() { }
+    };
+MakeDefaultConstructor(DefaultBaseClassConstructor);