js 点击复制功能兼容

copytext("需要复制的内容",function(){
  alert("复制成功!");
});
function copytext(txt,cd){
  var Url2 = txt;
  var oInput = document.createElement('input');
  oInput.value = Url2;
  document.body.appendChild(oInput);
  // oInput.select();
  selectText(oInput)
  document.execCommand("Copy");
  oInput.className = 'oInput';
  oInput.style.display = 'none';
  cd();
};
function selectText(oInput) {
  if(oInput.createTextRange) {//ie
    oInput.select();
  }else{//firefox/chrome
    oInput.setSelectionRange(0, oInput.value.length);
    oInput.focus();
  };
};

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转载自www.cnblogs.com/zjhuanjing/p/12572680.html
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