tabs.onActiveChanged

Warning: This event is deprecated. Use tabs.onActivated instead.

Fires when the selected tab in a window changes. Note that the tab's URL may not be set at the time this event fired, but you can listen to tabs.onUpdated events to be notified when a URL is set.

Syntax

browser.tabs.onActiveChanged.addListener(listener)
browser.tabs.onActiveChanged.removeListener(listener)
browser.tabs.onActiveChanged.hasListener(listener)

Events have three functions:

addListener(callback): Adds a listener to this event.
removeListener(listener): Stop listening to this event. The listener argument is the listener to remove.
hasListener(listener): Check whether listener is registered for this event. Returns true if it is listening, false otherwise.

addListener syntax

Parameters

callback

Function that will be called when this event occurs. The function will be passed the following arguments:

tabId: integer. The ID of the tab that has become active.
selectInfo: object. See the selectInfo section for more details.

Additional objects

selectInfo

windowId: integer. The ID of the window containing the selected tab.

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`onActiveChanged`	Yes	79	No	?	No	No	?	?	No	?	No	?

Note: This API is based on Chromium's chrome.tabs API. This documentation is derived from tabs.json in the Chromium code.

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/onActiveChanged