How to detect that the Chrome tab is broken

Question

I am writing an extension to register the use of Facebook. I found that even if the facebook tab crashed, the timer still counts, trying to fix it. According to the document , such an event does not exist.

Is there an API for detecting tab failure or crash event?

Answer 1

The chrome.processes.onExited event chrome.processes.onExited triggered when the renderer fails (which is the process that hosts one or more tabs).

This API is available only to users on the developer's channel , so if you want to make the extension widely available to everyone, then you need to use an alternative method. You can create a script content that creates a message port via chrome.runtime.connect , and in onDisconnect use chrome.tabs.sendMessage or chrome.tabs.executeScript to check if the tab is alive: If the tab no longer exists, then chrome.runtime.lastError will be installed and an error message will be displayed.

Answer 2

Here's how I managed to detect a page drop in my Chrome extension:

• the background script should send a “check” message to the content script at intervals, and the content script should return a response.
• If the page crashes, the response to the background script will be vague, then do what you need. In my case, refresh the page.

 content_script: ... chrome.runtime.onMessage.addListener(function(msg, sender, sendResponse) { if (msg.action == 'page_check') { sendResponse('OK'); } }); 

 background.js: ... setInterval(() => { chrome.tabs.query({ url: 'http://<your_page_defined_in_manifest>' }, function (tabs) { if (tabs.length > 0) { chrome.tabs.sendMessage(tabs[0].id, { action: "page_check" }, function (response) { if (!response) { chrome.tabs.reload(tabs[0].id); } }); } }); }, 60000); //every minute