How will the calls affect by the checkbox , Document will unload ?

[gmadala]

Hello, 
I have a question, 
How will the data collection/calls affect the checkbox, "document will unload". 

What I have observed is if I uncheck this, it will give the request type is "interact" or if I check the box the request type is "collect" ?
Please let me know if this could affect the calls, performance etc. 

[bjoern__koth]

Hi @gmadala 

ticking the checkbox will turn the request into a beacon/ping that is choosing a different request type. You regular requests are GET or POST requests, whereas a beacon is designed/intended to be sent in the browser background which will likely improve tracking accuracy.

This can be crucial if you put a click tracking on e.g., a button or link that causes a browser navigation and might be canceled from the browser for performance reasons. This is a classic issue with click tracking.

Downside of this request type is that the payload is not as easy to analyze by for instance automated tests and/or browser extensions.

What's also not ideal is that the UI only shows a checkbox and does not let you evaluate whether it should be sent as beacon on the fly, for a generic click tracking that only uses the beacon when needed.

in AppMeasurement, this could be set onthe fly on request base with a.useBeacon = true and automatically get reset after the request.

https://developer.mozilla.org/en-US/docs/Web/API/Beacon_API

[gmadala]

So you would recommend, unchecking the box for link calls and keep it checked for regular pageview calls ? 
I would like to know whats the standard across.

[bjoern__koth · Accepted solution]

Added some more context to my initial reply. 

No:

• don't tick it on page views since the user will likely stay long enough to make the request go through 
• tick it in cases where you experience aborted tracking calls
• as mentioned, none of your extensions, even the Experience Platform Debugger will be able to show you the request payload which is quite annoying 
• personal opinion: with nowadays browsers caring more and more about performance and user experience, I wouldn't be surprised if the beacon API will soon also be ignored

[Jagpreet_Singh_]

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