I was making my player inventory in a game and I can't figure out how to define the item and add a total amount, someone please help me. I came up with this in "Javascript" code.

(function() {
    'use strict';
 socket.on("move", function (data) {
      data = parseData(data);
      var player = players[socket.playerID];
      player.pos = data.pos;
      io.sockets.in(socket.houseID).emit("move", { playerID: player.playerID, team: player.team, pos: player.pos });
      let powers = (
        player.Inventory.item
          );
     })();
     player.powers['Recombine'] = new powers(...);
var player.Inventory.itemAmount = _.reduce(player.powers, function(totalAmount, powers) {
         return totalAmount(1000);
     }

Please help and do what you can, I would really appreciate it. thanks