Copy Text to Clipboard

async function copyToClipboard(text) {
  if (navigator.clipboard?.writeText) {
    return navigator.clipboard.writeText(text);
  }
  // Fallback
  const el = Object.assign(document.createElement('textarea'), {
    value: text,
    style: 'position:fixed;opacity:0',
  });
  document.body.appendChild(el);
  el.select();
  document.execCommand('copy');
  document.body.removeChild(el);
}

// Usage
button.addEventListener('click', async () => {
  await copyToClipboard('Hello, world!');
  button.textContent = 'Copied!';
  setTimeout(() => (button.textContent = 'Copy'), 2000);
});