add all frontend files

node_modules/rc-util/lib/Children/mapSelf.js

@@ -0,0 +1,15 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = mapSelf;
+var _react = _interopRequireDefault(require("react"));
+function mirror(o) {
+  return o;
+}
+function mapSelf(children) {
+  // return ReactFragment
+  return _react.default.Children.map(children, mirror);
+}

node_modules/rc-util/lib/Children/toArray.d.ts

@@ -0,0 +1,5 @@
+import React from 'react';
+export interface Option {
+    keepEmpty?: boolean;
+}
+export default function toArray(children: React.ReactNode, option?: Option): React.ReactElement[];

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

@@ -0,0 +1,26 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = toArray;
+var _isFragment = _interopRequireDefault(require("../React/isFragment"));
+var _react = _interopRequireDefault(require("react"));
+function toArray(children) {
+  var option = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+  var ret = [];
+  _react.default.Children.forEach(children, function (child) {
+    if ((child === undefined || child === null) && !option.keepEmpty) {
+      return;
+    }
+    if (Array.isArray(child)) {
+      ret = ret.concat(toArray(child));
+    } else if ((0, _isFragment.default)(child) && child.props) {
+      ret = ret.concat(toArray(child.props.children, option));
+    } else {
+      ret.push(child);
+    }
+  });
+  return ret;
+}