ABPCMS.Web/lib/sweetalert/dev/modules/handle-dom.js

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var hasClass = function(elem, className) {
  return new RegExp(' ' + className + ' ').test(' ' + elem.className + ' ');
};

var addClass = function(elem, className) {
  if (!hasClass(elem, className)) {
    elem.className += ' ' + className;
  }
};

var removeClass = function(elem, className) {
  var newClass = ' ' + elem.className.replace(/[\t\r\n]/g, ' ') + ' ';
  if (hasClass(elem, className)) {
    while (newClass.indexOf(' ' + className + ' ') >= 0) {
      newClass = newClass.replace(' ' + className + ' ', ' ');
    }
    elem.className = newClass.replace(/^\s+|\s+$/g, '');
  }
};

var escapeHtml = function(str) {
  var div = document.createElement('div');
  div.appendChild(document.createTextNode(str));
  return div.innerHTML;
};

var _show = function(elem) {
  elem.style.opacity = '';
  elem.style.display = 'block';
};

var show = function(elems) {
  if (elems && !elems.length) {
    return _show(elems);
  }
  for (var i = 0; i < elems.length; ++i) {
    _show(elems[i]);
  }
};

var _hide = function(elem) {
  elem.style.opacity = '';
  elem.style.display = 'none';
};

var hide = function(elems) {
  if (elems && !elems.length) {
    return _hide(elems);
  }
  for (var i = 0; i < elems.length; ++i) {
    _hide(elems[i]);
  }
};

var isDescendant = function(parent, child) {
  var node = child.parentNode;
  while (node !== null) {
    if (node === parent) {
      return true;
    }