Create utility helper for camel casing text with hyphens

This helper will be used when converting CSS styles to JS objects.
Then the `style` object will be consistent in the React props.

Author: remarkablemark

lib/utilities.js

@@ -0,0 +1,34 @@
+'use strict';
+
+/**
+ * Convert a string to camel case.
+ *
+ * @param  {String} string - The string.
+ * @return {String}
+ */
+function camelCase(string) {
+    if (typeof string !== 'string') {
+        throw new Error('`camelCase`: first argument must be a string.');
+    }
+
+    // hyphen found after first character
+    if (string.indexOf('-') > 0) {
+        var strings = string.toLowerCase().split('-');
+
+        // capitalize starting from the second string item
+        for (var i = 1, len = strings.length; i < len; i++) {
+            strings[i] = strings[i].charAt(0).toUpperCase() + strings[i].slice(1);
+        }
+
+        return strings.join('');
+    }
+
+    return string;
+}
+
+/**
+ * Export utilties.
+ */
+module.exports = {
+    camelCase: camelCase
+};