Google Chrome exstension chrome.tabs.onUpdated.addListener
google-chrome, google-chrome-extension, javascript, tabs
Solution
You are calling `chrome.tabs` from a Content Script.
By design, content scripts are not allowed access to most of the Chrome APIs.
You need to make a background page to access `chrome.tabs`, but in your particular case you don't even need that wrapper: you're injecting at `"document_end"`, which should mean that all static DOM is already loaded
And if the DOM node you are looking for is dynamically added, it may not exist when "complete" fires for a tab. You will need to listen to DOM mutations.
Problem
Problem: Uncaught TypeError: Cannot read property 'onUpdated' of undefined Google Chrome extension My code: main.js I have a function getCookie and setcookie ``` var _a = getCookie("a"); if (_a != "") { /// do something } else { chrome.tabs.onUpdated.addListener(function(tabId , info , tab) { if (info.status == "complete") { var _a = document.getElementsByName('id_loaded_page')[0].value; setCookie("_a", value, 1); console.log("_a: " +_a); } }); } ```