Izmjenjena struktura, dodan backand

web/node_modules/react/lib/sliceChildren.js

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+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+'use strict';
+
+var ReactChildren = require('./ReactChildren');
+
+/**
+ * Slice children that are typically specified as `props.children`. This version
+ * of slice children ignores empty child components.
+ *
+ * @param {*} children The children set to filter.
+ * @param {number} start The first zero-based index to include in the subset.
+ * @param {?number} end The non-inclusive last index of the subset.
+ * @return {object} mirrored array with mapped children
+ */
+function sliceChildren(children, start, end) {
+  if (children == null) {
+    return children;
+  }
+
+  var array = ReactChildren.toArray(children);
+  return array.slice(start, end);
+}
+
+module.exports = sliceChildren;