/*!
* tabbable 5.2.1
* @license MIT, https://github.com/focus-trap/tabbable/blob/master/LICENSE
*/
var candidateSelectors = ['input', 'select', 'textarea', 'a[href]', 'button', '[tabindex]', 'audio[controls]', 'video[controls]', '[contenteditable]:not([contenteditable="false"])', 'details>summary:first-of-type', 'details'];
var candidateSelector = /* #__PURE__ */candidateSelectors.join(',');
var matches = typeof Element === 'undefined' ? function () {} : Element.prototype.matches || Element.prototype.msMatchesSelector || Element.prototype.webkitMatchesSelector;

var getCandidates = function getCandidates(el, includeContainer, filter) {
  var candidates = Array.prototype.slice.apply(el.querySelectorAll(candidateSelector));

  if (includeContainer && matches.call(el, candidateSelector)) {
    candidates.unshift(el);
  }

  candidates = candidates.filter(filter);
  return candidates;
};

var isContentEditable = function isContentEditable(node) {
  return node.contentEditable === 'true';
};

var getTabindex = function getTabindex(node) {
  var tabindexAttr = parseInt(node.getAttribute('tabindex'), 10);

  if (!isNaN(tabindexAttr)) {
    return tabindexAttr;
  } // Browsers do not return `tabIndex` correctly for contentEditable nodes;
  // so if they don't have a tabindex attribute specifically set, assume it's 0.


  if (isContentEditable(node)) {
    return 0;
  } // in Chrome, <details/>, <audio controls/> and <video controls/> elements get a default
  //  `tabIndex` of -1 when the 'tabindex' attribute isn't specified in the DOM,
  //  yet they are still part of the regular tab order; in FF, they get a default
  //  `tabIndex` of 0; since Chrome still puts those elements in the regular tab
  //  order, consider their tab index to be 0.


  if ((node.nodeName === 'AUDIO' || node.nodeName === 'VIDEO' || node.nodeName === 'DETAILS') && node.getAttribute('tabindex') === null) {
    return 0;
  }

  return node.tabIndex;
};

var sortOrderedTabbables = function sortOrderedTabbables(a, b) {
  return a.tabIndex === b.tabIndex ? a.documentOrder - b.documentOrder : a.tabIndex - b.tabIndex;
};

var isInput = function isInput(node) {
  return node.tagName === 'INPUT';
};

var isHiddenInput = function isHiddenInput(node) {
  return isInput(node) && node.type === 'hidden';
};

var isDetailsWithSummary = function isDetailsWithSummary(node) {
  var r = node.tagName === 'DETAILS' && Array.prototype.slice.apply(node.children).some(function (child) {
    return child.tagName === 'SUMMARY';
  });
  return r;
};

var getCheckedRadio = function getCheckedRadio(nodes, form) {
  for (var i = 0; i < nodes.length; i++) {
    if (nodes[i].checked && nodes[i].form === form) {
      return nodes[i];
    }
  }
};

var isTabbableRadio = function isTabbableRadio(node) {
  if (!node.name) {
    return true;
  }

  var radioScope = node.form || node.ownerDocument;

  var queryRadios = function queryRadios(name) {
    return radioScope.querySelectorAll('input[type="radio"][name="' + name + '"]');
  };

  var radioSet;

  if (typeof window !== 'undefined' && typeof window.CSS !== 'undefined' && typeof window.CSS.escape === 'function') {
    radioSet = queryRadios(window.CSS.escape(node.name));
  } else {
    try {
      radioSet = queryRadios(node.name);
    } catch (err) {
      // eslint-disable-next-line no-console
      console.error('Looks like you have a radio button with a name attribute containing invalid CSS selector characters and need the CSS.escape polyfill: %s', err.message);
      return false;
    }
  }

  var checked = getCheckedRadio(radioSet, node.form);
  return !checked || checked === node;
};

var isRadio = function isRadio(node) {
  return isInput(node) && node.type === 'radio';
};

var isNonTabbableRadio = function isNonTabbableRadio(node) {
  return isRadio(node) && !isTabbableRadio(node);
};

var isHidden = function isHidden(node, displayCheck) {
  if (getComputedStyle(node).visibility === 'hidden') {
    return true;
  }

  var isDirectSummary = matches.call(node, 'details>summary:first-of-type');
  var nodeUnderDetails = isDirectSummary ? node.parentElement : node;

  if (matches.call(nodeUnderDetails, 'details:not([open]) *')) {
    return true;
  }

  if (!displayCheck || displayCheck === 'full') {
    while (node) {
      if (getComputedStyle(node).display === 'none') {
        return true;
      }

      node = node.parentElement;
    }
  } else if (displayCheck === 'non-zero-area') {
    var _node$getBoundingClie = node.getBoundingClientRect(),
        width = _node$getBoundingClie.width,
        height = _node$getBoundingClie.height;

    return width === 0 && height === 0;
  }

  return false;
}; // form fields (nested) inside a disabled fieldset are not focusable/tabbable
//  unless they are in the _first_ <legend> element of the top-most disabled
//  fieldset


var isDisabledFromFieldset = function isDisabledFromFieldset(node) {
  if (isInput(node) || node.tagName === 'SELECT' || node.tagName === 'TEXTAREA' || node.tagName === 'BUTTON') {
    var parentNode = node.parentElement;

    while (parentNode) {
      if (parentNode.tagName === 'FIELDSET' && parentNode.disabled) {
        // look for the first <legend> as an immediate child of the disabled
        //  <fieldset>: if the node is in that legend, it'll be enabled even
        //  though the fieldset is disabled; otherwise, the node is in a
        //  secondary/subsequent legend, or somewhere else within the fieldset
        //  (however deep nested) and it'll be disabled
        for (var i = 0; i < parentNode.children.length; i++) {
          var child = parentNode.children.item(i);

          if (child.tagName === 'LEGEND') {
            if (child.contains(node)) {
              return false;
            } // the node isn't in the first legend (in doc order), so no matter
            //  where it is now, it'll be disabled


            return true;
          }
        } // the node isn't in a legend, so no matter where it is now, it'll be disabled


        return true;
      }

      parentNode = parentNode.parentElement;
    }
  } // else, node's tabbable/focusable state should not be affected by a fieldset's
  //  enabled/disabled state


  return false;
};

var isNodeMatchingSelectorFocusable = function isNodeMatchingSelectorFocusable(options, node) {
  if (node.disabled || isHiddenInput(node) || isHidden(node, options.displayCheck) || // For a details element with a summary, the summary element gets the focus
  isDetailsWithSummary(node) || isDisabledFromFieldset(node)) {
    return false;
  }

  return true;
};

var isNodeMatchingSelectorTabbable = function isNodeMatchingSelectorTabbable(options, node) {
  if (!isNodeMatchingSelectorFocusable(options, node) || isNonTabbableRadio(node) || getTabindex(node) < 0) {
    return false;
  }

  return true;
};

var tabbable = function tabbable(el, options) {
  options = options || {};
  var regularTabbables = [];
  var orderedTabbables = [];
  var candidates = getCandidates(el, options.includeContainer, isNodeMatchingSelectorTabbable.bind(null, options));
  candidates.forEach(function (candidate, i) {
    var candidateTabindex = getTabindex(candidate);

    if (candidateTabindex === 0) {
      regularTabbables.push(candidate);
    } else {
      orderedTabbables.push({
        documentOrder: i,
        tabIndex: candidateTabindex,
        node: candidate
      });
    }
  });
  var tabbableNodes = orderedTabbables.sort(sortOrderedTabbables).map(function (a) {
    return a.node;
  }).concat(regularTabbables);
  return tabbableNodes;
};

var focusable = function focusable(el, options) {
  options = options || {};
  var candidates = getCandidates(el, options.includeContainer, isNodeMatchingSelectorFocusable.bind(null, options));
  return candidates;
};

var isTabbable = function isTabbable(node, options) {
  options = options || {};

  if (!node) {
    throw new Error('No node provided');
  }

  if (matches.call(node, candidateSelector) === false) {
    return false;
  }

  return isNodeMatchingSelectorTabbable(options, node);
};

var focusableCandidateSelector = /* #__PURE__ */candidateSelectors.concat('iframe').join(',');

var isFocusable = function isFocusable(node, options) {
  options = options || {};

  if (!node) {
    throw new Error('No node provided');
  }

  if (matches.call(node, focusableCandidateSelector) === false) {
    return false;
  }

  return isNodeMatchingSelectorFocusable(options, node);
};

export { focusable, isFocusable, isTabbable, tabbable };
//# sourceMappingURL=index.esm.js.map