javascript - 在没有任何mapstatetoprops的情况下在redux中连接，并且仍然将其作为props

我看到在redux中的connect中已经完成了这种怪异的方式，并且我很难理解正在做什么以及如何进行。
这是连接代码

export default connect(({ cricketFantasy: { matchDetails } }) => {
  let innings = [];
  let matchInfo = null;
  let currentOver = -1;
  let currentPlayer1Id = null;

  if (matchDetails && Object.keys(matchDetails).length) {
    const {
      homeTeam,
      awayTeam,
      tournament,
      gameDateTime,
      matchDescription,
      venue,
      currentInning,
      officials,
      squad,
      toss,
      matchState
    } = matchDetails;
    if (homeTeam && homeTeam.innings && homeTeam.innings.length) {
      homeTeam.innings.forEach(inning => {
        innings.push({
          order: inning.order,
          battingTeamName: inning.battingTeam,
          isCurrentInning: inning.id === currentInning.id
        });
      });
    }
   // some more operations which i deleted as that is not major concern
  return {
    innings,
    matchInfo,
    currentOver,
    currentPlayer1Id,
    currentPlayer2Id,
    tournamentId,
    squad: squadObj,
    matchState: matchStateStr,
    isFetchingMatchDetail: false,
    routes,
    detailsData: matchDetails
  };
})(withStyles(styles)(withLocale(CricketScore)));

我尝试在组件的render方法中进行控制台日志操作，但我看到返回的任何内容都可以看作是props。但是，我担心的是（{cricketFantasy：{matchDetails}}）来自此。我看不到术语cricketFantasy .js文件中此代码所在的任何位置。
我也没有看到任何mapStateToProps。

最佳答案

{ cricketFantasy: { matchDetails } }是destructuring assignment。

它依赖于包含state属性的cricketFantasy，该属性的值是具有matchDetails属性的对象。

基本上，这只是以下几种形式：

const matchDetails = state.cricketFantasy.matchDetails;

要么

const { matchDetails } = state.cricketFantasy;

const mapStateToProps = ({ cricketFantasy: { matchDetails } }) =>
  console.log({ matchDetails });

const state = {
  cricketFantasy: {
    matchDetails: "Hello"
  }
};

const mapStateToProps2 = (state) => {
  const matchDetails = state.cricketFantasy.matchDetails;
  console.log({ matchDetails });
};

mapStateToProps(state);
mapStateToProps2(state);