js拷贝指定内容到剪切板

 function copyTextToClipboard(text) {
  var textArea = document.createElement("textarea");
  textArea.style.background = 'transparent';
  textArea.value = text;
  document.body.appendChild(textArea);
  textArea.select();
  try {
    var successful = document.execCommand('copy');
    var msg = successful ? 'successful' : 'unsuccessful';
  } catch (err) {
  console.log('Oops, unable to copy');
  }
 document.body.removeChild(textArea);}