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tabs.onSelectionChanged

files/en-us/mozilla/add-ons/webextensions/api/tabs/onselectionchanged/index.md

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[!WARNING] This event is deprecated. Use {{WebExtAPIRef("tabs.onActivated")}} instead.

Fires when the selected tab in a window changes.

Syntax

js-nolint
browser.tabs.onSelectionChanged.addListener(listener)
browser.tabs.onSelectionChanged.removeListener(listener)
browser.tabs.onSelectionChanged.hasListener(listener)

Events have three functions:

  • addListener(listener)
    • : 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

  • listener
    • : The function called when this event occurs. The function is passed these 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 the selected tab changed in.

{{WebExtExamples}}

Browser compatibility

{{Compat}}

[!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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