javascript - Chrome extension how to detect that domain has changed in specific tab -

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i trying detect when specific tab has domain change - example, leave facebook.com go stackoverflow.com. want detect given tab - not if go facebook.com in 1 tab , stackoverflow.com in another. when event happens, need know domain unloaded. if in specific tab navigate facebook.com stackoverflow.com need event trigger , "facebook.com" stored in variable.

i thought following work, tab id changes (and think loading new tab id vs 1 unloaded page??) it's not working. ideas?

in content script:

window.onbeforeunload = function () {           var host = location.host;          chrome.runtime.sendmessage({unloadevent : host}, function(response){              if(response.issuccess){                 console.log('unload message sent');             }         });     }

in background:

chrome.runtime.onmessage.addlistener(     function(request, sender, sendresponse) {         console.log('request ', request);     ...      else if (request.unloadevent){          var queryinfo = {             active: true,             currentwindow: true             };         chrome.tabs.query(queryinfo, function(tabs) {            var tab = tabs[0];            var url = tab.url, id = tab.id, host =request.unloadevent;             console.log('the current url ' + url + ' , host ' + host);             if(!tabs[id]){             console.log("maybe im new page?");             }            /*if(tabs[id] && tabs[i] !== request.unloadevent){             console.log("im different site in tab");            }*/             tabs[id] = host;             console.log(tabs);             sendresponse({issuccess : true});        });     }   });

no, sorry. tabid changes when remove/close tab , using content script bad idea.

the right fit use chrome.tabs.onupdated in following:

     chrome.tabs.onupdated.addlistener(function(tabid, changeinfo, tab) {         if (changeinfo.status == 'complete') {             alert('tabid: ' + tabid + 'url: ' + changeinfo.url + 'tab status: ' + changeinfo.status);         }     });

this must included in background script.


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