--- a/js.rst	Mon Mar 12 12:56:46 2018 +0200
+++ b/js.rst	Wed Mar 14 17:26:25 2018 +0200
@@ -93,6 +93,14 @@
 http://caniuse.com/use-strict
   Can I use ECMAScript 5 Strict Mode?
 
+Level of feature support in JS engines
+======================================
+
+http://node.green/
+  Node.js features.
+https://fhinkel.rocks/six-speed/
+  Performance of ES6 features relative to the ES5 baseline operations.
+
 Pretty print from JavaScript.
 =============================
 ::