how to get current tabId from background page

Question

how to get current tabId from background page? current tabId is the tab that user can see its content.

background.html

Answer 1

Run this in your background page

chrome.tabs.query({active:true,windowType:"normal", currentWindow: true},function(d){console.debug(d);})

or even better

chrome.tabs.query({active:true,windowType:"normal", currentWindow: true},function(d){console.debug(d[0].id);})

Answer 2

getSelected has been deprecated. The new way to do it is:

chrome.tabs.query(
  {currentWindow: true, active : true},
  function(tabArray){...}
)

If you want to perform some callback on the active tab, you can wrap the above as so:

function doInCurrentTab(tabCallback) {
    chrome.tabs.query(
        { currentWindow: true, active: true },
        function (tabArray) { tabCallback(tabArray[0]); }
    );
}

For example

var activeTabId;
doInCurrentTab( function(tab){ activeTabId = tab.id } );

Answer 3

Many API methods interpret null as a current tab. chrome.tabs.sendRequest is one of them.

Otherwise:

chrome.tabs.getSelected(null, function(tab) { ... })

Answer 4

If you have tabs user permission, the query method is this: chrome.tabs.query

---

getCurrentWindowActiveTabIndex().then(tabIndex => {
    // do something
});

// asnyc getter, not just a regular 'thunk'
function getCurrentWindowActiveTabIndex () {
    return new Promise((resolve, reject) => {
        chrome.tabs.query({
            currentWindow: true,
            active: true,
        }, (currentWindowActiveTabs = []) => {
            if (!currentWindowActiveTabs.length) reject();
            resolve(currentWindowActiveTabs[0].index);
        });
    });
}