text: 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(arr, i) { if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) return; var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
  
  function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
  
  import * as React from 'react';
  import { findListDiffIndex } from '../utils/algorithmUtil';
  export default function useDiffItem(data, getKey, onDiff) {
    var _React$useState = React.useState(data),
        _React$useState2 = _slicedToArray(_React$useState, 2),
        prevData = _React$useState2[0],
        setPrevData = _React$useState2[1];
  
    var _React$useState3 = React.useState(null),
        _React$useState4 = _slicedToArray(_React$useState3, 2),
        diffItem = _React$useState4[0],
        setDiffItem = _React$useState4[1];
  
    React.useEffect(function () {
      var diff = findListDiffIndex(prevData || [], data || [], getKey);
  
      if ((diff === null || diff === void 0 ? void 0 : diff.index) !== undefined) {
        onDiff === null || onDiff === void 0 ? void 0 : onDiff(diff.index);
        setDiffItem(data[diff.index]);
      }
  
      setPrevData(data);
    }, [data]);
    return [diffItem];
  }