赋值时属性丢失数据之一 javascript object

Question

我花了一天时间调查这个案子，但没有看到任何希望。

const Tests = (state = INIT_STATE, action) => {
  switch (action.type) {
    case GET_TEST_DETAIL:
      return {
          ...state,
          test: {},
          error: {},
          updatingTest: true,
      }

    case GET_TEST_DETAIL_SUCCESS:
      const test = action.payload
      console.log(action.payload.shortName)//has data
      test["shortName2"] = action.payload.shortName//has data
      test["shortName"] = action.payload.shortName//empty string

      console.log(test)

      return {
          ...state,
          test: test,
          updatingTest: false,
      }

有我在 firefox 和 Edge console.log 时捕获的图片：

Answer 1

没有错。

 const action = { payload: { shortName: 'I am a shortname' } } const test = action.payload console.log(action.payload.shortName)//has data test["shortName2"] = action.payload.shortName//has data test["shortName"] = action.payload.shortName//empty string console.log(test)