Javascript 创建第一个窗口时，chrome.windows.onCreated.addListener（）未运行

我希望窗口在首次创建窗口时提示用户。如果用户创建了另一个新窗口（例如：从窗口中拉出一个选项卡以创建自己的窗口，或者第二次单击chrome图标），而不是在创建第一个窗口时，“我的代码”会提示用户。为什么会这样

背景脚本：

//an array of current open windows.
var windowArray = {};

//when a new window is created, start the creation of a new package.
chrome.windows.onCreated.addListener(createWindowPackage);


//get current window's id
function getCurrentWinID(callback){
  console.log("getCurrentWinID() called")
  var windId;
  chrome.windows.getCurrent(function(currentWin){
     windId = currentWin.id;
      //console.log("from getCurrentWinID(), windId = " + windId)
     //*****unique window Id properly getting retrieved here
     callback(windId);
  });  
}

//_______________________________________________________________________________________

//start the creation of a new 'windowPackage' object by prompting the user for a goal. 
function createWindowPackage(){
    var goal = prompt("What is your goal this browsing session?","E.g: To watch Daniel Schiffman's first video.");
  var windId;

  //getting the current window's id
  getCurrentWinID(function(windId){
    var winId = windId.toString();
    //*****unique window id properly received here

    //in the windowArray, have the windId key refer to a new windowPackage object.
    windowArray[winId] = new windowPackage(goal, windId);
    //*****so we've successfully created a new window package with this goal and a unique window Id
  });
}

//_________________________________________________________________________________________
//a window package includes the window id and a tasks[] array
class windowPackage{
    constructor(startTask, winId){
        this.id = winId;//winId is a string right now.
        this.tasks = [startTask];
        this.goal = startTask;
        this.isItOn = 1;
    }

但是，在创建第一个新窗口时，上面的代码并不用于提示用户，但此代码确实有效：

//an array of current open windows.
var goal;

chrome.windows.onCreated.addListener(askGoal);

function askGoal(){
    goal = prompt("What is your goal this browsing session?","E.g: To watch Daniel Schiffman's first video.");
    isItOn = 1;

}

1） 如果我理解正确，第一个窗口是在任何扩展运行之前创建的主浏览器窗口（除非您指定后台权限并允许Chrome运行此类后台扩展）。2） chrome.windows.getCurrent没有做您认为的事情，请再次查看其描述，因此您只需使用传递给onCreated callback的参数，请参阅文档，您只需声明函数createWindowPackage（{id:winId}），在manifest.json中将“背景”添加到“权限”中即可，谢谢：）