What is the correct way to listen on a port in a chrome extension?

Question

Google

The task is not to let the tab die, and if the connection to the background page is lost, then reload
background.js

chrome.extension.onConnect.addListener(function(port) {
        console.log("Connected .....");
        port.onMessage.addListener(function(msg) {
             try{
                port.postMessage('active_port');
             } catch {
                port.postMessage('disable_port');
             }
        });
   })

script.js

setInterval(() => {
    try {
        var port = chrome.extension.connect({
            name: "Sample Communication"
        });
        port.postMessage("active back");
        port.onMessage.addListener(function(msg) {
            console.log(msg);
        });
    } catch {
        localStorage.setItem('reload_' + appId, 1);
        location.reload();
    }

}, 5000);

Answer 1

Every second, send a message from the content script to the background process: In the background process, listen for incoming messages:
chrome.extension.sendMessage('Ваше сообщение');

chrome.extension.onMessage.addListener(function(message) {
  console.log('Принято сообщение: ' + message);
});

If the link to a particular tab is lost, recreate it or update it.
PS There are other ways to prevent freezing of the tab, if you're interested, I'll tell you.