前端实现复制功能

export function copyToClipboard(textToCopy: string) {
  if (!textToCopy) {return;}
  const textArea = document.createElement('textarea');
  textArea.value = textToCopy;
  textArea.style.position = 'fixed';
  textArea.style.left = '-999999px';
  textArea.style.top = '-999999px';
  document.body.appendChild(textArea);
  textArea.focus();
  textArea.select();
  return new Promise((resolve, reject) => {
    if (document.execCommand('copy')) {
      resolve(true);
    }
    else {
      reject(new Error('-1'));
    }
    textArea.remove();
  });
}