An implementation of a Modal Component with React Hooks ! See https://react-modal.viclafouch.vercel.app

modal.jsx

import React, { useEffect, useImperativeHandle, useState, forwardRef, useCallback } from 'react'
import { createPortal } from 'react-dom'
import './styles.css'

const modalElement = document.getElementById('modal-root')

export function Modal({ children, fade = false, defaultOpened = false }, ref) {
  const [isOpen, setIsOpen] = useState(defaultOpened)

  const close = useCallback(() => setIsOpen(false), [])

  useImperativeHandle(ref, () => ({
    open: () => setIsOpen(true),
    close
  }), [close])

  const handleEscape = useCallback(event => {
    if (event.keyCode === 27) close()
  }, [close])

  useEffect(() => {
    if (isOpen) document.addEventListener('keydown', handleEscape, false)
    return () => {
      document.removeEventListener('keydown', handleEscape, false)
    }
  }, [handleEscape, isOpen])

  return createPortal(
    isOpen ? (
      <div className={`modal ${fade ? 'modal-fade' : ''}`}>
        <div className="modal-overlay" onClick={close} />
        <span role="button" className="modal-close" aria-label="close" onClick={close}>
          x
        </span>
        <div className="modal-body">{children}</div>
      </div>
    ) : null,
    modalElement
  )
}

export default forwardRef(Modal)

styles.css

.modal {
  position: fixed;
  overflow: hidden;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: rgba(0, 0, 0, 0.65);
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5em 1em;
  z-index: 999999;
  box-sizing: border-box;
}

.modal.modal-fade {
  animation: fade-in 1s 1 linear;
  animation-fill-mode: forwards;
  opacity: 0;
}

.modal > .modal-overlay {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

.modal > .modal-close {
  position: absolute;
  right: 15px;
  top: 10px;
  color: #5e5e5e;
  cursor: pointer;
  font-size: 1.25em;
  padding: 7px;
  background: rgba(255, 255, 255, 0.749);
  border: 1px solid #c3c0c0;
  border-radius: 50%;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999999;
  box-sizing: border-box;
  display: inline-block;
  text-align: center;
}

.modal > .modal-close:hover {
  background: rgba(255, 255, 255, 0.989);
}

.modal > .modal-body {
  z-index: 2;
  position: relative;
  margin: 0 auto;
  background-color: #303030;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 3px;
  overflow-x: hidden;
  overflow-y: auto;
  max-height: 100%;
  padding: 15px 20px;
  color: #c3c0c0;
}


@keyframes fade-in {
  0% {
    animation-timing-function: cubic-bezier(0.2242, 0.7499, 0.3142, 0.8148);
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}