NodeJS WebSocket 中的局部持久變量

Question

我正在嘗試為每個 WebSocket 連接制作持久變量player ，如下所示：

Server.on('request', function(request) {
    const WSCon = request.accept(null, request.origin);
    var player = "none";
    WSCon.on('message', function(message) {
        if (data.action == 0) HandleRoomEnter(player);
        if (data.action == 1) HandleReadyness(player);
    });
});

function HandleRoomEnter(player) {
    player = "Conan";
    console.log("setting: "+player);
}
function HandleReadyness(player) {
    console.log("getting: "+player);
}

但是，我的 output 是：

setting: Conan
getting: none

問題出在哪里？

謝謝，

Answer 1

這是這樣做的正確方法：

Server.on('request', function(request) {
    const WSCon = request.accept(null, request.origin);
    let player = "none";
    function HandleRoomEnter(player) {
        player = "Conan";
        console.log("setting: "+player);
    }
    function HandleReadyness(player) {
        console.log("getting: "+player);
    }

    WSCon.on('message', function(message) {
        if (data.action == 0) HandleRoomEnter(player);
        if (data.action == 1) HandleReadyness(player);
    });
});

也請使用 let 或 const 代替 var。