Idea: Conditional Chrome theme based on environment [closed]

Answer 1

Themes are not dynamic, so the solution is not straightforward.
It's possible to create the feature using the management API. At least three extension are needed:

• The main extension for switching themes.
• Theme #1, theme #2 etc (an extra extension for every additional theme).

How to

1. Create a theme - See the Chrome themes documentation.
2. Bind a chrome.tabs.onUpdated event to listen for tab changes, and possibly save the state of known "theme-tabs" in a hash (by tabId). Don't forget to remove the tabId when the tab's URI is not "special" any more, using the delete operator.
3. Create another extension, with a background script.
   Add a chrome.tabs.onActivated ^{Warning: See below} event, to listen for tab changes. This event is passed a windowId and tabId. Use the hash, created in step 2, to check whether the theme has to be changed or not.
4. If the URL matches a certain pattern, activate the new theme using the chrome.management.setEnabled method.

Alternative approach for step 3-4: Use Content scripts to call a method the background page. The match patterns can then be set in the manifest file, at the "content_scripts", "matches" section.

^Warning: The onActivated event was not supported prior Chrome 18. Before Chrome 18, the event was called onActiveChanged.

The extension as described in steps 2-4 requires the following permissions:

• management
• tabs