is it possible to flush all batched events at once?

[lukehatcher]

I know there is

mixpanel.track('my event', {foo: 'bar'}, { 'send_immediately': true });

Similarly, I know I can edit the config - but that only effects following events, plus I still want batching.

mixpanel.set_config({ batch_requests: false });
// or
mixpanel.set_config({ batch_flush_interval_ms: 0 });

Use Case: I have a large batch_flush_interval_ms interval and want to flush everything before navigation to a new external URL, but I don't want to give up my batching and use send_immediately every time I call mixpanel.track

I have tried editing the flushAfter property of the events queued inside localStorage with no luck.

[tdumitrescu]

I don't think we currently have a publicly-exposed method to flush everything. The SDK does already attempt to flush every time the page/tab loses visibility:

mixpanel-js/src/mixpanel-core.js

Lines 308 to 334 in 34b4396

	if (sendBeacon && window.addEventListener) {
	// Before page closes or hides (user tabs away etc), attempt to flush any events
	// queued up via navigator.sendBeacon. Since sendBeacon doesn't report success/failure,
	// events will not be removed from the persistent store; if the site is loaded again,
	// the events will be flushed again on startup and deduplicated on the Mixpanel server
	// side.
	// There is no reliable way to capture only page close events, so we lean on the
	// visibilitychange and pagehide events as recommended at
	// https://developer.mozilla.org/en-US/docs/Web/API/Window/unload_event#usage_notes.
	// These events fire when the user clicks away from the current page/tab, so will occur
	// more frequently than page unload, but are the only mechanism currently for capturing
	// this scenario somewhat reliably.
	var flush_on_unload = _.bind(function() {
	if (!this.request_batchers.events.stopped) {
	this.request_batchers.events.flush({unloading: true});
	}
	}, this);
	window.addEventListener('pagehide', function(ev) {
	if (ev['persisted']) {
	flush_on_unload();
	}
	});
	window.addEventListener('visibilitychange', function() {
	if (document['visibilityState'] === 'hidden') {
	flush_on_unload();
	}
	});

but this can never be totally reliable.

If you just want something that works quickly, calling mixpanel.start_batch_senders() will cause them to flush immediately even if it's already running (but this is an implementation detail).

[rahulbansal16]

I am using it in an electron app and I want to flush out everything before all windows are closed.
The implementation etc is happening in the main process so there is no window over there.