text: "use strict";
  
  Object.defineProperty(exports, "__esModule", {
    value: true
  });
  exports.default = void 0;
  
  var _js_utils = require("./utils/js_utils");
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
  
  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  
  var EnterLeaveCounter =
  /*#__PURE__*/
  function () {
    function EnterLeaveCounter(isNodeInDocument) {
      _classCallCheck(this, EnterLeaveCounter);
  
      this.entered = [];
      this.isNodeInDocument = isNodeInDocument;
    }
  
    _createClass(EnterLeaveCounter, [{
      key: "enter",
      value: function enter(enteringNode) {
        var _this = this;
  
        var previousLength = this.entered.length;
  
        var isNodeEntered = function isNodeEntered(node) {
          return _this.isNodeInDocument(node) && (!node.contains || node.contains(enteringNode));
        };
  
        this.entered = (0, _js_utils.union)(this.entered.filter(isNodeEntered), [enteringNode]);
        return previousLength === 0 && this.entered.length > 0;
      }
    }, {
      key: "leave",
      value: function leave(leavingNode) {
        var previousLength = this.entered.length;
        this.entered = (0, _js_utils.without)(this.entered.filter(this.isNodeInDocument), leavingNode);
        return previousLength > 0 && this.entered.length === 0;
      }
    }, {
      key: "reset",
      value: function reset() {
        this.entered = [];
      }
    }]);
  
    return EnterLeaveCounter;
  }();
  
  exports.default = EnterLeaveCounter;