在chrome扩展名中捕获URL

Question

Try to capture the url chrome browser using chrome extension background script.

I try below code is working fine for new url change but not working in tab change

background.js

chrome.tabs.getSelected(null, function(tab) {
           chrome.extension.getBackgroundPage().console.log(tab.url);
});

manifest.json

{
  "manifest_version": 2,

  "name": "My Test Extension",
  "description": "This extension demonstrates.",
  "version": "1.0",

  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": ["background.js"]
  },
  "permissions": [
      "tabs",
       "activeTab",
        "http://*/*",
        "https://*/*"
  ]
}

console log print once when it install after that no response.

I want to capture URL of current tab... when user change the browser tab or create new tab I need to capture the url of the current browser tab in background without click extension icons.

After get the URL I need to append one query string at the end of the URL.

for example

current tab url : stackoverflow.com extension change/append url : stackoverflow.com/question/java

Answer 1

below code working fine as expected

chrome.tabs.onUpdated.addListener( function( tabId,  changeInfo,  tab) {
       chrome.extension.getBackgroundPage().console.log(tab.url);
       if(tab.url=="https://www.google.co.in/"){
            chrome.tabs.update(tab.id, {url: 'https://www.yahoo.com/'});
       }
});

let me know the comments

Answer 2

Listen for the onUpdated event.

chrome.tabs.onUpdated.addListener(function(integer tabId, object changeInfo, Tab tab) {...});

http://developer.chrome.com/extensions/tabs.html#event-onUpdated

Answer 3

1) Event for when the active tab is changed:

chrome.tabs.onActivated.addListener(function(object activeInfo) {...});

From documentation :

Fires when the active tab in a window changes. Note that the tab's URL may not be set at the time this event fired, but you can listen to onUpdated events to be notified when a URL is set.

2) Most likely, you also need to listen to the chrome.windows.onFocusChanged event which is fired when the currently focused window is changed.