下面的代码在调度时抛出错误：

// countSlice.js
const countSlice = createSlice({
    name: "count",
    initialState: 0,
    reducers: {
        add(state) {state += 1},
    },
});

但是，如果我将initialState更改为一个对象，代码就可以正常工作：

// countSlice.js
const countSlice = createSlice({
    name: "count",
    initialState: {value: 0}, // now it works!
    reducers: {
        add(state) {state.value += 1},
    },
});

如果我将initialState保留为数字，但将reducer编写为数组函数，则代码也可以工作：

// countSlice.js
const countSlice = createSlice({
    name: "count",
    initialState: 0,
    reducers: {
        add: state => state + 1, // also works!
    },
});

“我刚刚学习Redux，就被这个搞糊涂了，这和Immer有关系吗？我是不是把Redux的功能搞错了？”