diff --git a/jopa.js b/jopa.js
new file mode 100644
index 0000000..56acfb9
--- /dev/null
+++ b/jopa.js
@@ -0,0 +1,5 @@
+function same(x, y)  {
+    if (x !== x && y !== y)  // lgtm[js/comparison-of-identical-expressions]
+        return true;
+    return x === y;
+}