I'm working on NodeJs project

This is not working

import Env from "./utils/Env";

Error [ERR_MODULE_NOT_FOUND]: Cannot find module ...\Env

This is my Env.js code

export default class Env {
  static isLocal() {
    return !(process.env.NODE_ENV === 'production');
  }
  static isProd() {
    if (process.env.NODE_ENV === 'production' && process.env.GCLOUD_PROJECT === 'extendedbuilder') {
        return true;
    }
    return false;
  }
}

But if I add .js, then works

import Env from "./utils/Env.js";

Is there any way for ignoring the ".js" when I'm importing the module?

Thank you