map.js

  let playersList = {};
    listeId.map((ident, i) => {
    playersList[ident] = {
        score : 0,
        x : 0,
        y : 0
      }
    })
const playersList = listeId.reduce( (p, c) => ({ ...p, [c]: { score: 0, x: 0 , y:0 } }), {});