Content script detect when it's tab gets focus

[patrick]

Simple question.... I need my content script to run a method when the
page tab get's focus. Can I do this in the content script itself? Or
do I need the background page to listen for the onSelectionChanged
event and send a message to the relevant content script?? (sorry if
it's a silly question! : )

[x29a]

hi patrick,

as you can read here:

http://code.google.com/chrome/extensions/dev/content_scripts.html

content scripts cannot access most of the chrome.tabs API so you will
need to use

http://code.google.com/chrome/extensions/messaging.html

to deliver the needed information. if its just about the tab.id, maybe
this post will help you:

http://stackoverflow.com/questions/6202953/obtaining-this-tab-id-from-content-script-in-chrome-extension

no problem to ask a "silly question", as long as you tried solving it
for yourself first by e.g. a search on stackoverflow or the docs ;)

[Chiuto]

yes you need the background page.

it is the permission design of contentscripts

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