建议代码块右上角加上复制按钮

刚写好一个，可以参考一下

async function copyToClipboard(text) {
  try {
    return navigator.clipboard.writeText(text)
  } catch {
    const element = document.createElement('textarea')
    const previouslyFocusedElement = document.activeElement

    element.value = text

    element.setAttribute('readonly', '')

    element.style.contain = 'strict'
    element.style.position = 'absolute'
    element.style.left = '-9999px'
    element.style.fontSize = '12pt'

    const selection = document.getSelection()
    const originalRange = selection ? selection.rangeCount > 0 && selection.getRangeAt(0) : null

    document.body.appendChild(element)
    element.select()

    element.selectionStart = 0
    element.selectionEnd = text.length

    document.execCommand('copy')
    document.body.removeChild(element)

    if (originalRange) {
      selection.removeAllRanges()
      selection.addRange(originalRange)
    }

    if (previouslyFocusedElement) {
      previouslyFocusedElement.focus()
    }
  }
}


export default copyToClipboard

.highlight > pre > span.copy {
  position: absolute;
  top: 0px;
  right: 0px;
  z-index: 2;
  display: block;
  justify-content: center;
  align-items: center;
  border-radius: 4px;
  width: 20px;
  height: 20px;
  opacity: 0;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' height='20' width='20' stroke='rgba(128,128,128,1)' stroke-width='2' class='h-6 w-6' viewBox='0 0 24 24'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M9 5H7a2 2 0 0 0-2 2v12a2 2 0 0 0 2 2h10a2 2 0 0 0 2-2V7a2 2 0 0 0-2-2h-2M9 5a2 2 0 0 0 2 2h2a2 2 0 0 0 2-2M9 5a2 2 0 0 1 2-2h2a2 2 0 0 1 2 2'/%3E%3C/svg%3E");
  background-position: 50%;
  background-size: 20px;
  background-repeat: no-repeat;
  transition: opacity 0.25s;
}

.highlight:hover > pre > span.copy {
  opacity: 1;
}