长时间不访问页面时内容脚本将卸载

Question

我正在开发一个浏览器扩展，即使在后台自动刷新后，该扩展也需要一直运行。问题在于，页面会随机自动卸载，而脚本只是关闭。我需要找到一种始终保持内容脚本运行的方法。这是代码的一部分：

// content.js:
    function run(fn) {
      if(typeof(Worker) !== "undefined") {
        if(typeof(w) == "undefined") {
          w = new Worker(URL.createObjectURL(new Blob(['('+fn+')()'])));
        }
        w.onmessage = function(event) {
          if (isNaN(grabbedmin) && ID) {
            bump() // Note: the bump function refreshes in the page.
            w.terminate();
          }
          if ($("[href='/server/bump/" + ID + "']").text().includes("Bump")) {
            bump()
            w.terminate();
          }
          document.getElementById("bumpcount").innerHTML = "Autobumper Enabled: " + getCurrentTimestamp();
          if (numberwow == grabbedmin) {
            bump()
            w.terminate();
          }
        };
      }
    }

上面的代码基本上由该工作人员每分钟运行一次：

// content.js:
    const worker = run(function() {

      var i = 0;

      function timedCount() {
        i = i + 1;
        postMessage(i);
        setTimeout(function(){timedCount()},1000);
      }

      timedCount();
    });

background.js是否有办法在应有的状态下检测到content.js未运行（或页面已卸载），然后重新加载它？

注意：您可以在这里找到脚本：https://github.com/Theblockbuster1/disboard-auto-bump

Answer 1

[浏览docs并查看示例后，我将其放在一起：

chrome.tabs.query({
  url: ["*://disboard.org/*dashboard/servers", "*://disboard.org/*dashboard/servers/"] // finds matching tabs
}, function(tabs) {
  tabs.forEach(tab => {
    chrome.tabs.update(tab.id,{autoDiscardable:false});
  });
});

chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
  // checks if the tab somehow got discarded and notifies the user:
  if (changeInfo.discarded == true) chrome.notifications.create('', {
    title: 'Looks like the tab got discarded.',
    message: "(that wasn't supposed to happen...) Return to the tab to resume.",
    contextMessage: 'oops...',
    iconUrl: '/disboard-auto-bump-logo.png',
    requireInteraction: false,
    type: 'basic'
  });
  // checks if the browser automatically re-enabled autoDiscarding and disables it
  if (changeInfo.autoDiscardable == true) chrome.tabs.update(tabId,{autoDiscardable:false});
});