add all frontend files

node_modules/rc-util/es/Children/toArray.js

@@ -0,0 +1,19 @@
+import isFragment from "../React/isFragment";
+import React from 'react';
+export default function toArray(children) {
+  var option = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+  var ret = [];
+  React.Children.forEach(children, function (child) {
+    if ((child === undefined || child === null) && !option.keepEmpty) {
+      return;
+    }
+    if (Array.isArray(child)) {
+      ret = ret.concat(toArray(child));
+    } else if (isFragment(child) && child.props) {
+      ret = ret.concat(toArray(child.props.children, option));
+    } else {
+      ret.push(child);
+    }
+  });
+  return ret;
+}