acud

Version:
acg react 组件库
31 lines (30 loc) • 1.93 kB
JavaScript
"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
var _typeof = require("@babel/runtime/helpers/typeof");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = useDiffItem;
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var React = _interopRequireWildcard(require("react"));
var _algorithmUtil = require("../utils/algorithmUtil");
function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function _interopRequireWildcard(e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, "default": e }; if (null === e || "object" != _typeof(e) && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (var _t in e) "default" !== _t && {}.hasOwnProperty.call(e, _t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, _t)) && (i.get || i.set) ? o(f, _t, i) : f[_t] = e[_t]); return f; })(e, t); }
function useDiffItem(data, getKey, onDiff) {
  var _React$useState = React.useState(data),
    _React$useState2 = (0, _slicedToArray2["default"])(_React$useState, 2),
    prevData = _React$useState2[0],
    setPrevData = _React$useState2[1];
  var _React$useState3 = React.useState(null),
    _React$useState4 = (0, _slicedToArray2["default"])(_React$useState3, 2),
    diffItem = _React$useState4[0],
    setDiffItem = _React$useState4[1];
  React.useEffect(function () {
    var diff = (0, _algorithmUtil.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];
}