/* * SonarQube * Copyright (C) 2009-2024 SonarSource SA * mailto:info AT sonarsource DOT com * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 3 of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ import { RefObject, useCallback, useLayoutEffect, useState } from 'react'; // Modified from source: https://codesandbox.io/s/zw8kylol8m export interface ResizeObserverEntry { contentRect: DOMRectReadOnly; target: Element; } export const useResizeObserver = (ref: RefObject) => { const [width, setWidth] = useState(); const [height, setHeight] = useState(); const handleResize = useCallback((entries: ResizeObserverEntry[]) => { if (!Array.isArray(entries)) { return; } const entry = entries[0]; setWidth(entry.contentRect.width); setHeight(entry.contentRect.height); }, []); useLayoutEffect(() => { if (!ref.current) { return; } const RO = new ResizeObserver(handleResize); RO.observe(ref.current); return () => { RO.disconnect(); }; }, [handleResize, ref]); return [width, height] as const; };