Question

Possible Duplicate:
Check whether user has my chrome extension installed

A little background. I’m creating a Chrome extension to interact with data between a company’s intranet site to open and login to social media sites. I want to write buttons on a page with Javascript only if I have verified that the extension actually exists in that browser. The button is useless otherwise. Let me know if you’ve found a clean way to do that!

Thanks!

Answer 1

Write buttons on a page with JavaScript, from your Extension.

Find below the way you can.

manifest.json

{

  "name": "Example",

  "description": "Description",

  "version": "0.6",

  "permissions": ["tabs", "http://mysite.com/*"],

  "background": {

    "scripts": ["background.js"]

  },

  "manifest_version": 2

}

background.js

chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
  var HOST_NAME = 'mysite.com';
  if(changeInfo.status === "complete")
  if(tab.url.search(HOST_NAME) !== -1) {
    var execute_script_param = { "file": "excecute_js.js",
                                 "runAt": "document_start"
                               }
    chrome.tabs.executeScript(tabId, execute_script_param, function() {
      console.log('added extension identity in dom');
      // if you want to do here, go ahead
    })
  }
});

excecute_js

(function(obj_document) {
  // do here what ever you want
  // write buttons on a page with Javascript
})(window.document)