NotionNext/themes/medium/components/BottomMenuBar.js

import Link from 'next/link'
import { useMediumGlobal } from '..'
import JumpToTopButton from './JumpToTopButton'

export default function BottomMenuBar({ post, className }) {
  const { tocVisible, changeTocVisible } = useMediumGlobal()
  const showTocButton = post?.toc?.length > 0

  const toggleToc = () => {
    changeTocVisible(!tocVisible)
  }

  return (
    <div
      className={
        'sticky z-10 bottom-0 w-full h-12 bg-white dark:bg-hexo-black-gray ' +
        className
      }>
      <div className='flex justify-between h-full shadow-card'>
        <Link href='/search' passHref legacyBehavior>
          <div className='flex w-full items-center justify-center cursor-pointer'>
            <i className='fas fa-search' />
          </div>
        </Link>
        <div className='flex w-full items-center justify-center cursor-pointer z-20'>
          <JumpToTopButton />
        </div>
        {showTocButton && (
          <div
            onClick={toggleToc}
            className='flex w-full items-center justify-center cursor-pointer z-30'>
            <i className='fas fa-list-ol ' />
          </div>
        )}
        {!showTocButton && (
          <Link href='/' passHref legacyBehavior>
            <div className='flex w-full items-center justify-center cursor-pointer'>
              <i className='fas fa-home' />
            </div>
          </Link>
        )}
      </div>
    </div>
  )
}