"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _react = require("react");
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
function _iterableToArrayLimit(r, l) { var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (null != t) { var e, n, i, u, a = [], f = !0, o = !1; try { if (i = (t = t.call(r)).next, 0 === l) { if (Object(t) !== t) return; f = !1; } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0); } catch (r) { o = !0, n = r; } finally { try { if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return; } finally { if (o) throw n; } } return a; } }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
var defaultThreshold = [0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1];
function useIntersect() {
  var rootMargin = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '0px';
  var _useState = (0, _react.useState)(null),
    _useState2 = _slicedToArray(_useState, 2),
    ratio = _useState2[0],
    updateRatio = _useState2[1];
  var _useState3 = (0, _react.useState)(null),
    _useState4 = _slicedToArray(_useState3, 2),
    node = _useState4[0],
    setNode = _useState4[1];
  var observer = (0, _react.useRef)(null);
  (0, _react.useEffect)(function () {
    if (!node || typeof IntersectionObserver === 'undefined') {
      return undefined;
    }
    if (observer.current) observer.current.disconnect();
    observer.current = new IntersectionObserver(function (_ref) {
      var _ref2 = _slicedToArray(_ref, 1),
        entry = _ref2[0];
      return updateRatio(entry.intersectionRatio);
    }, {
      rootMargin: rootMargin,
      threshold: defaultThreshold
    });
    var currentObserver = observer.current;
    if (node) currentObserver.observe(node);
    return function () {
      return currentObserver.disconnect();
    };
  }, [node, rootMargin]);
  return [setNode, ratio];
}
var _default = exports.default = useIntersect;