Merge pull request #5275 from segmentio/vanand17-patch-9

Add info about keepalive flag in AJS

Author: stayseesong

src/connections/sources/catalog/libraries/website/javascript/index.md

@@ -343,6 +343,7 @@ The Analytics.js utility methods help you change how Segment loads on your page.
 - [On (Emitter)](#emitter)
 - [Timeout](#extending-timeout)
 - [Reset (Logout)](#reset-or-log-out)
+- [Keepalive](#keepalive)
 
 ### Load
 
@@ -473,6 +474,9 @@ The `reset` method only clears the cookies and `localStorage` created by Segment
 
 Segment doesn't share `localStorage` across subdomains. If you use Segment tracking on multiple subdomains, you must call `analytics.reset()` for each subdomain to completely clear out the user session.
 
+### Keepalive
+
+You can utilize this in instances where an API call fires on a hard redirect, and are missed from getting captured in Segment. If you set this flag to true, it enables firing the event before the redirect. This is available for all events. You can read more about this in the [Github PR](https://github.com/segmentio/analytics-next/issues/768#issuecomment-1386100830){:target="_blank"}.
 
 
 ## Managing data flow with the Integrations object