add all frontend files

node_modules/rc-util/es/hooks/useEvent.js

@@ -0,0 +1,13 @@
+import * as React from 'react';
+export default function useEvent(callback) {
+  var fnRef = React.useRef();
+  fnRef.current = callback;
+  var memoFn = React.useCallback(function () {
+    var _fnRef$current;
+    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+      args[_key] = arguments[_key];
+    }
+    return (_fnRef$current = fnRef.current) === null || _fnRef$current === void 0 ? void 0 : _fnRef$current.call.apply(_fnRef$current, [fnRef].concat(args));
+  }, []);
+  return memoFn;
+}