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1/*
2 * Copyright 2020 Adobe. All rights reserved.
3 * This file is licensed to you under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License. You may obtain a copy
5 * of the License at http://www.apache.org/licenses/LICENSE-2.0
6 *
7 * Unless required by applicable law or agreed to in writing, software distributed under
8 * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
9 * OF ANY KIND, either express or implied. See the License for the specific language
10 * governing permissions and limitations under the License.
11 */
12
13import {ForwardedRef, MutableRefObject} from 'react';
14
15/**
16 * Merges multiple refs into one. Works with either callback or object refs.
17 */
18export function mergeRefs<T>(...refs: Array<ForwardedRef<T> | MutableRefObject<T> | null | undefined>): ForwardedRef<T> {
19 if (refs.length === 1 && refs[0]) {
20 return refs[0];
21 }
22
23 return (value: T | null) => {
24 for (let ref of refs) {
25 if (typeof ref === 'function') {
26 ref(value);
27 } else if (ref != null) {
28 ref.current = value;
29 }
30 }
31 };
32}