Tests events (on, off, trigger)

src/scripts/lib/events/on.js

@@ -0,0 +1,11 @@
+var forEachEls = require("../foreach-els")
+
+module.exports = function(els, events, listener, useCapture) {
+  events = (typeof events === "string" ? events.split(" ") : events)
+
+  events.forEach(function(e) {
+    forEachEls(els, function(el) {
+      el.addEventListener(e, listener, useCapture)
+    })
+  })
+}