Javascript 能量为0时停止移动

我正在使用node.js、socket.io和create.js创建一个4人游戏。在我的游戏中，每个玩家都有能量，当玩家移动时，能量会减少。当能量为0或更少时，我想停止玩家。但我做不到

服务器端：

socket.on('move', function(data)
                     {
                         var w = data["dir"];
                         var x = data["x"];
                         var y = data["y"];
                         var e = data["energy"];
                         console.log(e);
                                if(w == "down")
                                    y += 5;

                                if(w == "up")
                                    y -= 5;

                                if(w == "left")
                                    x -= 5;

                                if(w == "right")
                                    x += 5;

                                if(e <= 0)
                                {
                                    x+=0;
                                    y+=0;
                                }

                                socket.broadcast.emit("_movement2",data);
                                socket.emit("_movement",{ "X" : x, "Y" : n       y});
 });

switch(evt.keyCode)
            {
                case 37:    
                          energy--;
                            $("#energy").css({"width" : energy});
                        socket.emit("move", {"y" : player.playerImage.y,  "x": player.playerImage.x, "dir" : "left", "id":player_id, "energy" : energy});
                            break;
                case 38:    
                            energy--;
                            $("#energy").css({"width" : energy});
                            socket.emit("move", {"y" : player.playerImage.y, "x" : player.playerImage.x, "dir" : "up", "id":player_id, "energy" : energy});


                            break;
                case 39:     
                energy--;
                            $("#energy").css({"width" : energy});
                            socket.emit("move", {"x" : player.playerImage.x, "y" : player.playerImage.y, "dir": "right", "id":player_id , "energy" : energy});

                            break;
                case 40:    
                                energy--;
                            $("#energy").css({"width" : energy});
                socket.emit("move", {"y" : player.playerImage.y, "x" : player.playerImage.x, "dir" : "down", "id":player_id, "energy" : energy});
                break;
            }



        socket.on("_movement", function(data)
        {
            player.playerImage.x = data["X"];
            player.playerImage.y = data["Y"];
                });

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谢谢大家的关注

您的if语句不正确。 您希望按照以下思路做一些事情：

if(energy <= 0) {
    //don't move
}
else {
    //move
}

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if（能量）我得到了，但如何真正阻止玩家，使他不移动。如果我不在if中写入任何内容，它将继续移动。您是否将
if（w==…）
移动到了else部分？如果（e）那么您正在代码中的其他地方移动。