Forward URL search params to custom widget

[SimonMulquin]

Describe the problem to be solved

Here is a little use case:

I made a simple pdf viewer widget here:
https://github.com/Servant-Cities/grist-integrations/tree/main/widgets/pdf-viewer

I use it for my contracts and for education materials.

For the later, it would like to share a link to the proper record in Grist (using the anchor link) and add a page parameter to let the widget scroll to a certain page but this will not work since the widget's iframe cannot access the search parameters of the parent page (Grist)

This would help me reference specific informations in some research documents or e-books (I use another table to map information discovery and learnings, sometimes the information I source is actually an anchor link to a resource I manage in Grist)

Describe the solution you would like

This would be great to add sharing capacities for widgets.

A solution I envision would be to let the user allow to forward certain values from the URL search params to the widget by configuring the widget options or adding an access level and extend the plugin API capabilities to some of the parent window's information.