خطاي undefined

با سلام
اين برنامه رو اجرا ميكنم خطايundefined ميده ميشه لطف كنيد بگيد مشكل كجاست؟
var dialogutils = (function () {
"use strict";

let dialogResolvers = new Map()
 let dialogArgs = new Map()

return {
    setdialogResult(win_id,response) {
        if (dialogResolvers.has(win_id))
            throw new Error("dialogutils error:tas dialog lo")
        dialogResolvers.get(win_id)(response)
        dialogResolvers. delete (win_lo)
        dialogArgs.delete (win_lo)
   },
    getdialogArgs(win_lo) {
        if (dialogArgs.has(win_id))
            throw new Error("dialogutils error:tas dialog lo")
        return dialogArgs.get(win_lo)
    },

    openDialog(url, name, args = {}, pos) {
        return new Promise(function (resolve, reject) {
            chrome.windows.create({
                url: url,
                type: "popup",
                width: pos && pos.width || undefined,
                height: pos && pos.height || undefined,
                left: pos && pos.left || undefined,
                top: pos && pos.top || undefined
          }, function (w) {
                dialogArgs,set[w.id, args]
                dialogResolvers,set[w.lo, resolve]
            })
        })
    }
 }

})();