Copy code MDX component

import { useRef, useState, Fragment } from 'react'
 
const CodeBlock = (props: {
  className: string | undefined
  children: React.ReactChildren
}): JSX.Element => {
  const textInput = useRef(null)
  const [hovered, setHovered] = useState(false)
  const [copied, setCopied] = useState(false)
 
  const onEnter = () => {
    setHovered(true)
  }
 
  const onExit = () => {
    setHovered(false)
    setCopied(false)
  }
 
  const onCopy = () => {
    setCopied(true)
    navigator.clipboard.writeText(textInput.current.textContent)
    setTimeout(() => {
      setCopied(false)
    }, 3000)
  }
 
  return (
    <div ref={textInput} onMouseEnter={onEnter} onMouseLeave={onExit} className='relative'>
      {hovered && (
        <button
          aria-label='Copy code'
          type='button'
          className={`absolute right-3 top-3 w-7 h-7 p-1 rounded border-2 bg-gray-200 dark:bg-[#282e33] ${
            copied
              ? 'focus:outline-none focus:border-green-500 border-green-500 dark:border-green-400 dark:focus:border-green-400'
              : 'border-gray-100 dark:border-gray-300'
          }`}
          onClick={onCopy}
        >
          <svg
            xmlns='http://www.w3.org/2000/svg'
            viewBox='0 0 24 24'
            stroke='currentColor'
            fill='none'
            className={
              copied ? 'text-green-500 dark:text-green-400' : 'text-gray-700 dark:text-gray-300'
            }
          >
            {copied ? (
              <Fragment>
                <path
                  strokeLinecap='round'
                  strokeLinejoin='round'
                  strokeWidth={2}
                  d='M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4'
                />
              </Fragment>
            ) : (
              <Fragment>
                <path
                  strokeLinecap='round'
                  strokeLinejoin='round'
                  strokeWidth={2}
                  d='M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2'
                />
              </Fragment>
            )}
          </svg>
        </button>
      )}
 
      <pre>{props.children}</pre>
    </div>
  )
}
 
export default CodeBlock