windows.onRemoved

Syntax

browser.windows.onRemoved.addListener(listener)
browser.windows.onRemoved.removeListener(listener)
browser.windows.onRemoved.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)

Checks whether a 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 this argument:

windowId

integer. ID of the window that was closed.

Examples

Log the IDs of windows as they are removed.

browser.windows.onRemoved.addListener((windowId) => {
  console.log(`Closed window: ${windowId}`);
});

Browser compatibility