lifterlms.js uses unload event, which is scheduled to be removed from chrome.

[dominiquemariano]

Reproduction Steps

1. Create a new site with a fresh install of LifterLMS.
2. Analyze that site using pagespeed.web.dev
3. In the results page, navigate down to General > Uses deprecated APIs

Expected Behavior

Shouldn't be using deprecated APIs that are scheduled to be removed from Chrome.

Actual Behavior

1 deprecation warning for UnloadHandler, as you can see in this screenshot. See https://developer.mozilla.org/en-US/docs/Web/API/Window/unload_event

This issue has be recreated:

• Locally
• On a staging site
• On a production website
• With only LifterLMS and a default theme

[brianhogg]

Looks like this might be removed from Chrome by the end of Q1 2025. May need to prioritize this a little higher.

[brianhogg]

https://developer.chrome.com/docs/web-platform/deprecating-unload

This appears to be related to the opt-in tracking script.