Javascript 如何在React/Redux中最好地初始化状态/设置第一个状态

目前，我正在我的减速机中执行以下操作：

export default function (state = null, action) {

    if(state==null)
    {
        state = [
            {
                id: 1,
                first: "Bucky",
                last: "Roberts",
                age: 71,
                description: "Bucky is a React developer and YouTuber",
                thumbnail: "http://i.imgur.com/7yUvePI.jpg"
            },
            {
                id: 2,
                first: "Joby",
                last: "Wasilenko",
                age: 27,
                description: "Joby loves the Packers, cheese, and turtles.",
                thumbnail: "http://i.imgur.com/52xRlm8.png"
            },
            {
                id: 3,
                first: "Madison",
                last: "Williams",
                age: 24,
                description: "Madi likes her dog but it is really annoying.",
                thumbnail: "http://i.imgur.com/4EMtxHB.png"
            }
        ]
    }

    switch (action.type) {
        case 'USER_DELETED':
            return state.filter(user => user.id !== action.userIdToDelete);
    }

    return state;
}

---

所以我检查state是否为null，如果为null，则填充它。是否有更好的方法，即不从内部填充减速器？在我看来，这是一个糟糕的做法…

而不是将其默认值设置为null-执行以下操作

        initialState = [
        {
            id: 1,
            first: "Bucky",
            last: "Roberts",
            age: 71,
            description: "Bucky is a React developer and YouTuber",
            thumbnail: "http://i.imgur.com/7yUvePI.jpg"
        },
        {
            id: 2,
            first: "Joby",
            last: "Wasilenko",
            age: 27,
            description: "Joby loves the Packers, cheese, and turtles.",
            thumbnail: "http://i.imgur.com/52xRlm8.png"
        },
        {
            id: 3,
            first: "Madison",
            last: "Williams",
            age: 24,
            description: "Madi likes her dog but it is really annoying.",
            thumbnail: "http://i.imgur.com/4EMtxHB.png"
        }
    ];

    export default function (state = initalState, action) {
     ...
    }

---

您应该始终将默认状态值设置为您期望的类型，因此这里的

function（state=[]）

更好。将其设置为null是一种反模式

---

然后，对于作为默认初始状态的数据，您应该使用createStore中的第二个参数来设置初始状态：

谢谢。然而，我的第二个参数是

applyMiddleware（thunk，promise，logger）

那么这是错误的吗？当包含初始（预加载）状态时，apply中间件将成为第三个参数。因此，在我发送给createStore的链接（reducer、[previedState]、[enhancer]）中，增强器是您的中间件。