在Chrome扩展程序弹出窗口上显示后窗口变量

Question

I am still learning about all the Chrome Extension scheme, with background/content/popup scripts.

I have a page that runs some script on $(document).ready() and it sets a new variable in the window, that i can access in the website like "window.newVariableHere". I want to be able to echo the content of this variable whenever i open the Extension popup.

I tried, in the popup.js (which is being called in my popup.html) do a:

chrome.extension.getBackgroundPage()

But it wont show the new variable (that i am sure it was created). Any ideas on a better way to do this?

Thanks for all the ideas

Answer 1

chrome.extension.getBackgroundPage() gives you the window object of the background page , not the actual displayed website in the current tab.

Please read the Architecture Overview . (All Chrome extension developers must read and understand that)

You will need a content script, and worse than that, you will need a page-level script since window object of the page is isolated from content scripts.