Modal.tsx

import React from 'react'
import ReactDOM from 'react-dom'
import { MODAL_ID } from 'core'
import cx from 'helpers/cx'
import Button from 'components/Button/Button'

import s from './style.module.css'

interface ModalProps {
  title?: string
  className?: string
  close?: () => void
  action?: () => void
  actionText?: string
}

const Modal: React.FC<ModalProps> = ({
  title,
  children,
  className,
  actionText = 'Close',
  action,
  close
}) => {
  const el = document.getElementById(MODAL_ID)
  if (el === null) return null

  const stopPropagation: React.MouseEventHandler<HTMLDivElement> = (e) =>
    e.stopPropagation()

  return ReactDOM.createPortal(
    <div className={s.modal} onClick={close}>
      <div className={s.modalBox} onClick={stopPropagation}>
        <div className={cx(s.modalContent, className)}>
          {title !== undefined && <h1 className={s.title}>{title}</h1>}

          {close !== undefined && (
            <div className={s.close} onClick={close}>
              ╳
            </div>
          )}

          <div>{children}</div>

          {action !== undefined && (
            <Button className={s.action} onClick={action}>
              {actionText}
            </Button>
          )}
        </div>
      </div>
    </div>,
    el
  )
}

export default Modal

style.module.css

.modal {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #111a;
}

.modalBox {
  border: 1px solid var(--c-main);
  max-height: 80vh;
  background: #1a1a1a;
  max-width: 80%;
  height: fit-content;
  overflow-y: scroll;
}

.modalContent {
  position: relative;
  text-align: center;
  box-sizing: border-box;
  padding: 30px 60px;

  & .title {
    margin-bottom: 30px;
    text-align: center;
    font-weight: 300;
    line-height: 1.4;
  }

  & .action {
    margin-top: 30px;
    margin-bottom: 5px;
  }

  & .close {
    position: absolute;
    top: 0;
    right: 0;
    padding: 10px;
    cursor: pointer;
    height: 20px;
    width: 20px;
  }
}

@media (--m-mobile) {
  .modalContent {
    padding: 30px;
  }
}

@media (--m-no-pointer) {
  .modal {
    height: var(--100vh);
  }

  .modalBox {
    max-height: calc(0.8 * var(--100vh));
  }
}