关于javascript:PC移动端复制文字到粘贴板

function copyText(data){  let isAndroid = u.indexOf('Android') > -1 || u.indexOf('Adr') > -1; //android终端  let isiOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/); //ios终端  let textarea = document.createElement('textarea');  textarea.id = "copyTextarea";  textarea.style.width = 0;  textarea.style.height = 0;  document.body.appendChild(textarea);  textarea = document.getElementById('copyTextarea');  textarea.innerHTML = data;  if(isiOS == "ios"){      const range = document.createRange();      range.selectNode(document.getElementById('copyTextarea'));      const selection = window.getSelection();      if (selection.rangeCount > 0) selection.removeAllRanges();      selection.addRange(range);  }else{      textarea.select(); // 选中文本(select()办法对IOS局部版本有效)  }  document.execCommand('copy');  textarea.blur()  document.body.removeChild(textarea);  alert('复制胜利！')},