Merge pull request primefaces#6264 from melloware/PR6263

Fix primefaces#6263: ButtonGroup use forwardRef properly

components/lib/buttongroup/ButtonGroup.js

@@ -2,22 +2,28 @@ import * as React from 'react';
 import { PrimeReactContext } from '../api/Api';
 import { useHandleStyle } from '../componentbase/ComponentBase';
 import { useMergeProps } from '../hooks/Hooks';
-import { classNames } from '../utils/Utils';
+import { ObjectUtils, classNames } from '../utils/Utils';
 import { ButtonGroupBase } from './ButtonGroupBase';
 
 export const ButtonGroup = React.memo(
-    React.forwardRef((inProps) => {
+    React.forwardRef((inProps, ref) => {
         const mergeProps = useMergeProps();
         const context = React.useContext(PrimeReactContext);
         const props = ButtonGroupBase.getProps(inProps, context);
+        const elementRef = React.useRef(ref);
         const { ptm, cx, isUnstyled } = ButtonGroupBase.setMetaData({
             props
         });
 
         useHandleStyle(ButtonGroupBase.css.styles, isUnstyled, { name: 'buttongroup' });
 
+        React.useEffect(() => {
+            ObjectUtils.combinedRefs(elementRef, ref);
+        }, [elementRef, ref]);
+
         const rootProps = mergeProps(
             {
+                ref: elementRef,
                 className: classNames(cx('root')),
                 role: 'group'
             },