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import React, { createContext, RefObject, useContext, useEffect, useRef, useState } from 'react';
import { createPortal } from 'react-dom';
import * as m from 'motion/react-m';
interface ModalContextType {
open: (context: React.ReactNode) => void;
close: () => void;
modalContentRef: RefObject<HTMLDivElement | null>;
}
const ModalContext = createContext<ModalContextType | null>(null);
export const useModal = () => {
const context = useContext(ModalContext);
if (!context) throw new Error('useModal must be used in ModalProvider');
return context;
};
interface ModalProviderProps {
children: React.ReactNode;
}
export const ModalProvider = ({ children }: ModalProviderProps) => {
const [mounted, setMounted] = useState(false);
const [isOpen, setIsOpen] = useState(false);
const [content, setContent] = useState<React.ReactNode>(null);
const previousFocusRef = useRef<HTMLElement | null>(null);
const lastInputTypeRef = useRef<'mouse' | 'keyboard'>('mouse');
const modalContentRef = useRef<HTMLDivElement>(null);
const isMouseDownInsideModal = useRef(false);
const open = (modalContent: React.ReactNode) => {
setContent(modalContent);
setIsOpen(true);
if (lastInputTypeRef.current === 'keyboard') {
previousFocusRef.current = document.activeElement as HTMLElement;
} else {
previousFocusRef.current = null;
}
};
const close = () => {
setContent(null);
setIsOpen(false);
if (previousFocusRef.current) {
const el = previousFocusRef.current;
setTimeout(() => {
el.focus();
}, 0);
previousFocusRef.current = null;
}
};
// Modal을 Open 할 때 키보드로 진입했다면 Trigger 요소를 기억함
useEffect(() => {
const handleMouseDown = () => {
lastInputTypeRef.current = 'mouse';
};
const handleKeyDown = (e: KeyboardEvent) => {
if (e.key === 'Tab' || e.key === 'Enter' || e.key === ' ') {
lastInputTypeRef.current = 'keyboard';
}
};
document.addEventListener('mousedown', handleMouseDown);
document.addEventListener('keydown', handleKeyDown);
return () => {
document.removeEventListener('mousedown', handleMouseDown);
document.removeEventListener('keydown', handleKeyDown);
};
}, []);
// Modal 외부 Mousedown => 내부 MouseUp 일 때 Modal이 닫히지 않음
// Modal 내부 Mousedown => 외부 MouseUp 일 때 Modal이 닫히지 않음
// Modal 외부 Mousedown => 외부 Mouseup 일 때 Modal 닫힘
useEffect(() => {
if (!isOpen) return;
const handleMouseDown = (e: MouseEvent) => {
if (modalContentRef.current?.contains(e.target as Node)) {
isMouseDownInsideModal.current = true;
} else {
isMouseDownInsideModal.current = false;
}
};
const handleMouseUp = (e: MouseEvent) => {
if (
!modalContentRef.current?.contains(e.target as Node) &&
isMouseDownInsideModal.current === false
) {
close();
}
};
document.addEventListener('mousedown', handleMouseDown);
document.addEventListener('mouseup', handleMouseUp);
return () => {
document.removeEventListener('mousedown', handleMouseDown);
document.removeEventListener('mouseup', handleMouseUp);
};
}, [isOpen]);
// esc 입력 시 Modal close
useEffect(() => {
const handleEscape = (e: KeyboardEvent) => {
if (e.key === 'Escape' && isOpen) close();
};
document.addEventListener('keydown', handleEscape);
return () => document.removeEventListener('keydown', handleEscape);
}, [isOpen]);
//Modal Open 상태일 시 body scroll 제거
useEffect(() => {
if (isOpen) {
document.body.style.overflow = 'hidden';
} else {
document.body.style.overflow = '';
}
return () => {
document.body.style.overflow = '';
};
}, [isOpen]);
// Modal Open 상태일 때 배경 요소들 무시
useEffect(() => {
if (!isOpen) return;
const appRoot = document.getElementById('root');
if (appRoot) {
appRoot.setAttribute('inert', '');
appRoot.setAttribute('aria-hidden', 'true');
}
return () => {
if (appRoot) {
appRoot.removeAttribute('inert');
appRoot.removeAttribute('aria-hidden');
}
};
}, [isOpen]);
// portal은 mount 된 후에 생성
useEffect(() => {
const onMount = () => {
setMounted(true);
};
onMount();
}, []);
return (
<ModalContext.Provider value={{ open, close, modalContentRef }}>
{children}
{mounted &&
createPortal(
<div id='modal-root'>
{isOpen && (
<m.div
className='fixed inset-0 z-9999 flex items-center justify-center bg-black/50'
animate={{
opacity: 1,
}}
aria-describedby='modal-description'
aria-labelledby='modal-title'
aria-modal='true'
initial={{ opacity: 0 }}
role='dialog'
>
<div className='flex w-full max-w-110 min-w-70 justify-center px-4'>{content}</div>
</m.div>
)}
</div>,
document.body,
)}
</ModalContext.Provider>
);
};
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