refactor: move randomVal to a lib

website/common/script/libs/randomVal.js

@@ -0,0 +1,18 @@
+import _ from 'lodash';
+
+function trueRandom () {
+  return Math.random();
+}
+
+// Get a random property from an object
+// returns random property (the value)
+module.exports = function randomVal (obj, options = {}) {
+  let array = options.key ? _.keys(obj) : _.values(obj);
+  let random = (options.predictableRandom || trueRandom)();
+
+  array.sort();
+
+  let randomIndex = Math.floor(random * array.length);
+
+  return array[randomIndex];
+};