检查选项卡是否存在并使其处于活动状态； 否则创建它

Question

I'm attempting to see if the tab ' http://google.com ' exists. If it does then I want to make it the active page. Otherwise, the tab ' http://google.com ' doesn't exist, and I want to create it.

backround.js

chrome.runtime.onMessage.addListener(function(response, sender, sendResponse){
    chrome.tabs.create({'url': 'http://google.com'}, function(tab) {
        alert('Tab Created ' + tab.id);
        var oms = tab.id;
        chrome.tabs.update(oms, {url:"http://en.wikipedia.org"});
    });
});

This creates the webpage, gets the tabid and sets the tabid as a variable.

Answer 1

Your current attempt seems to be trying to create a tab with Google, and then navigate it to Wikipedia. This doesn't agree with your initial paragraph. Instead, I think you want something similar to the following:

chrome.runtime.onMessage.addListener(function(response, sender, sendResponse){
    chrome.tabs.query({'url': 'http://google.com'}, function(tabs) {
        if ( tabs.length > 0 ) {
            chrome.tabs.update(tabs[0].id,{'active':true});
        } else {
            chrome.tabs.create({'url':'http://google.com'});
        }
    });
});

Note that this won't find http://www.google.com , or http://google.com/otherstuff . You'll probably want to use a match pattern .

You commented having trouble with updating the tab to be selected . The documentation says that selected is deprecated in favor of highlighted . This also hints what else may have happened: a highlighted tab is not necessarily active (specifically, you can have several tabs highlighted ).