启用分析在chrome扩展时，互联网是不可用的扩展开始

Enable analytics in chrome extension when internet is not available at start of extension

本文关键字：扩展 开始 互联网 chrome 启用      更新时间：2023-09-26

我使用分析在我的chrome扩展像这样

background.js 

// Standard Google Universal Analytics code
(function(i,s,o,g,r,a,m)    
{i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new     
Date();a=s.createElement(o),
m=s.getElementsByTagName(o)   
[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-  
analytics.com/analytics.js','ga'); 
ga('create', 'UA-XXXXX-YY', 'auto');
ga('set', 'checkProtocolTask', function(){}); // Removes failing protocol 
ga('require', 'displayfeatures');

在manifest.json

中拥有所有必要的权限

一切按预期工作，除了在扩展开始时没有互联网的情况。在这种情况下，事件不会发送到服务器，因为没有加载analytics.js。这将导致事件丢失，直到下次chrome重启并成功连接互联网。

使用XMLHttpRequest测试https://www.google-analytics.com/analytics.js是否可达。如果不是，使用chrome创建一个计时器。警报API(最好)或setInterval将重复此测试。一旦站点可访问，初始化GA。

我找到了一种优雅的方法

function loadAnalyticsScript() {
  // The standard Google Universal Analytics code
  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
  })(window,document,'script','https://www.google-analytics.com/analytics.js','ga'); // Note: https protocol here
}
var analyticsLoaded = false;  // initialise
loadAnalyticsScript();

/************Detect if analytics script has loaded **********/
// Method 1 src:https://davidsimpson.me/2014/05/27/add-googles-universal-analytics-tracking-chrome-extension/#comment-190946
ga(function(){
  // This function will be triggered when GA is successfully loaded for the first time.
  console.log(' +++ Google Analytics has loaded');
  analyticsLoaded = true;
});
// Alternative Method 2 src:https://www.domsammut.com/code/workaround-for-when-the-hitcallback-function-does-not-receive-a-response-analytics-js
if (ga.hasOwnProperty('loaded') && ga.loaded === true) {
    console.log(' +++ Google Analytics has loaded');
    analyticsLoaded = true;
}
/*************************************************/
// All the events tracking goes here
ga('create', 'UA-XXXXX-YY', 'auto');
ga('set', 'checkProtocolTask', function(){}); // Removes failing protocol check. @see: http://stackoverflow.com/a/22152353/1958200
ga('require', 'displayfeatures');
ga('send', 'pageview', '/options.html');
// Test to see if it's loaded yet.
var gaLoadTimer = setInterval(function(){
    if (analyticsLoaded === false) {
        console.log("Retrying for GA script");
        loadAnalyticsScript(); //try again
    }
    else{
        clearInterval(gaLoadTimer);
    }
}, 20000); // every 20s
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