使用伪元素工具提示单击时复制到剪贴板

<div class="tooltip" data-copy="Hello, World!">Click to copy</div>

.tooltip {
  position: relative;
  display: inline-block;
  cursor: pointer;
}

.tooltip::before {
  content: attr(data-copy);
  position: absolute;
  top: -30px;
  left: 0;
  padding: 5px;
  background-color: #f1f1f1;
  border: 1px solid #ccc;
  color: #333;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.3s;
}

.tooltip:hover::before {
  visibility: visible;
  opacity: 1;
}

document.addEventListener('click', function(event) {
  if (event.target.classList.contains('tooltip')) {
    var tooltip = event.target;
    var text = tooltip.getAttribute('data-copy');
    
    // Copy text to clipboard
    var textarea = document.createElement('textarea');
    textarea.value = text;
    document.body.appendChild(textarea);
    textarea.select();
    document.execCommand('copy');
    document.body.removeChild(textarea);
    
    // Show a confirmation message
    tooltip.setAttribute('data-copy', 'Copied!');
    setTimeout(function() {
      tooltip.setAttribute('data-copy', text);
    }, 1000);
  }
});