使用伪元素工具提示单击时复制到剪贴板

<button class="copy-btn">Copy Text</button>

.copy-btn {
  position: relative;
  padding: 10px 20px;
  cursor: pointer;
}

.copy-btn::after {
  content: attr(data-tooltip);
  visibility: hidden;
  opacity: 0;
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #333;
  color: #fff;
  padding: 5px 10px;
  border-radius: 5px;
  white-space: nowrap;
  transition: opacity 0.3s, visibility 0.3s;
}

.copy-btn:hover::after {
  visibility: visible;
  opacity: 1;
}

document.querySelector('.copy-btn').addEventListener('click', function() {
  const textToCopy = 'This is the text to copy';
  navigator.clipboard.writeText(textToCopy).then(() => {
    console.log('Text copied to clipboard');
  }).catch(err => {
    console.error('Failed to copy text: ', err);
  });
});