It might make sense to detect page visibility prior to loading a pay-per-load API like Mapbox GL JS, Apple Maps on Web, etc.

The scenario I imagine is:

1. Your map is loaded

2. User opens a new tab (your map is now in a background tab)

3. User restarts browser and existing tabs are loaded

4. You get charged for an API load even though the page is not visible

Does anyone know if this is the case?

Edit: also analytics. If you don't load your GA until page is visible, I wonder what impact that has on your visitor numbers