Sent to the event page just before it is unloaded. This gives the extension an opportunity to do some cleanup. Note that since the page is unloading, any asynchronous operations started while handling this event are not guaranteed to complete.
Note: If something prevents the event page from being unloaded, the runtime.onSuspendCanceled event will be sent and the page won't be unloaded.
Syntax
browser.runtime.onSuspend.addListener(listener) browser.runtime.onSuspend.removeListener(listener) browser.runtime.onSuspend.hasListener(listener)
Events have three functions:
addListener(callback)- Adds a listener to this event.
removeListener(listener)- Stop listening to this event. The
listenerargument is the listener to remove. hasListener(listener)- Checks whether a
listeneris registered for this event. Returnstrueif it is listening,falseotherwise.
addListener syntax
Parameters
callback-
Function that will be called when this event occurs.
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Chrome | Edge | Firefox | Firefox for Android | Opera | |
|---|---|---|---|---|---|
| Basic support | 22 | No | No | No | 15 |
Examples
Listen for suspend events:
function handleSuspend() {
console.log("Suspending event page");
// handle cleanup
}
browser.runtime.onSuspend.addListener(handleSuspend);
This API is based on Chromium's chrome.runtime API. This documentation is derived from runtime.json in the Chromium code.
Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.
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