Redux：store.getState 返回未定义的值

Question

为什么我的 store.getState 返回未定义的值！我对 ReactJS 和 Redux 很陌生，这里是我的代码

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import {createStore} from \'redux\';\n\nconst initialState = {\nsalary: 1000,\n}\n\nconst reducer = (state=initialState, action) => {\nswitch (action.type) {\n    case "ADD":\n        state = {\n            salary: state.salary+=action.payload,\n        }\n        break;\n\n    default:\n        break;\n}\n}\n\nconst store = createStore(reducer);\n\nstore.subscribe(() => {\nconsole.log(\'Update salary: \', store.getState.salary);\n})\n\nstore.dispatch({\ntype: "ADD",\npayload: 2000,\n});\n

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控制台：更新工资：\xe2\x80\x93 undefined

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谢谢。

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Answer 1

getState是一个方法，调用它

console.log('Update salary: ', store.getState().salary);

你甚至应该修理你的减速机

case "ADD":
   return {salary: state.salary + action.payload}

它必须返回新状态，你不返回任何东西