Question

要使用选择器，我尝试遵循以下URL参考：https://blog.isquaredsoftware.com/2017/12/idiomatic-redux-using-reselect-selectors/

一个例子是：

const selectSomeData = state => state.someData;

const selectFilteredSortedTransformedData = createSelector(
  selectSomeData,
  (someData) => {
    const filteredData = expensiveFiltering(someData);
    const sortedData = expensiveSorting(filteredData);
    const transformedData = expensiveTransformation(sortedData);

    return transformedData;
  }
)

const mapState = (state) => {
  const transformedData = selectFilteredSortedTransformedData(state);

  return {
    data: transformedData
  };
}

问题：在mapState中，我们调用selectFilteredSortedTransformedData，并且还将State作为参数传递。但是，函数本身没有任何参数，它如何工作？

const selectFilteredSortedTransformedData = createSelector(

Answer 1

您是否在redux connect函数中添加了mapState函数？像这样的东西。

导出默认的connect（mapState）（Component）

React-Redux选择器

1 个答案: