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Modal.tsx
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Modal.tsx
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/**
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
*/
import './Modal.css';
import * as React from 'react';
import {ReactNode, useEffect, useRef} from 'react';
import {createPortal} from 'react-dom';
function PortalImpl({
onClose,
children,
title,
closeOnClickOutside,
}: {
children: ReactNode;
closeOnClickOutside: boolean;
onClose: () => void;
title: string;
}) {
const modalRef = useRef<HTMLDivElement>(null);
useEffect(() => {
if (modalRef.current !== null) {
modalRef.current.focus();
}
}, []);
useEffect(() => {
let modalOverlayElement: HTMLElement | null = null;
const handler = (event: KeyboardEvent) => {
if (event.keyCode === 27) {
onClose();
}
};
const clickOutsideHandler = (event: MouseEvent) => {
const target = event.target;
if (
modalRef.current !== null &&
!modalRef.current.contains(target as Node) &&
closeOnClickOutside
) {
onClose();
}
};
const modelElement = modalRef.current;
if (modelElement !== null) {
modalOverlayElement = modelElement.parentElement;
if (modalOverlayElement !== null) {
modalOverlayElement.addEventListener('click', clickOutsideHandler);
}
}
window.addEventListener('keydown', handler);
return () => {
window.removeEventListener('keydown', handler);
if (modalOverlayElement !== null) {
modalOverlayElement?.removeEventListener('click', clickOutsideHandler);
}
};
}, [closeOnClickOutside, onClose]);
return (
<div className="Modal__overlay" role="dialog">
<div className="Modal__modal" tabIndex={-1} ref={modalRef}>
<h2 className="Modal__title">{title}</h2>
<button
className="Modal__closeButton"
aria-label="Close modal"
type="button"
onClick={onClose}>
X
</button>
<div className="Modal__content">{children}</div>
</div>
</div>
);
}
export default function Modal({
onClose,
children,
title,
closeOnClickOutside = false,
}: {
children: ReactNode;
closeOnClickOutside?: boolean;
onClose: () => void;
title: string;
}): JSX.Element {
return createPortal(
<PortalImpl
onClose={onClose}
title={title}
closeOnClickOutside={closeOnClickOutside}>
{children}
</PortalImpl>,
document.body,
);
}