tabs.onReplaced

Fired when a tab is replaced with another tab due to prerendering or instant.

This event may not be relevant for or supported by browsers other than Chrome.

Syntax

js
browser.tabs.onReplaced.addListener(listener)
browser.tabs.onReplaced.removeListener(listener)
browser.tabs.onReplaced.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:

addedTabId

integer. ID of the replacement tab.

removedTabId

integer. ID of the tab that was replaced.

Examples

Listen for replacement events, and log the associated info:

js
function handleReplaced(addedTabId, removedTabId) {
  console.log(`New tab: ${addedTabId}`);
  console.log(`Old tab: ${removedTabId}`);
}

browser.tabs.onReplaced.addListener(handleReplaced);

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Firefox for Android
Safari on iOS
onReplaced

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support

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