code: function lockScreenReader(element, options) {
        var isHidden = true;
  
        // get raw DOM node
        walkDOM(element[0]);
  
        options.unlockScreenReader = function () {
          isHidden = false;
          walkDOM(element[0]);
  
          options.unlockScreenReader = null;
        };
  
        /**
         * Get all of an element's parent elements up the DOM tree
         * @return {Array} The parent elements
         */
        function getParents(element) {
          var parents = [];
          while (element.parentNode) {
            if (element === document.body) {
              return parents;
            }
            var children = element.parentNode.children;
            for (var i = 0; i < children.length; i++) {
              // skip over child if it is an ascendant of the dialog
              // a script or style tag, or a live region.
              if (element !== children[i] &&
                  !isNodeOneOf(children[i], ['SCRIPT', 'STYLE']) &&
                  !children[i].hasAttribute('aria-live')) {
                parents.push(children[i]);
              }
            }
            element = element.parentNode;
          }
          return parents;
        }
  
        /**
         * Walk DOM to apply or remove aria-hidden on sibling nodes
         * and parent sibling nodes
         */
        function walkDOM(element) {
          var elements = getParents(element);
          for (var i = 0; i < elements.length; i++) {
            elements[i].setAttribute('aria-hidden', isHidden);
          }
        }
      }
docs: Prevents screen reader interaction behind modal window
  on swipe interfaces