Passing data from html/js element to bubble db

Goodmorning everyone . I have an iframe for the payment method within my bubble-built app. I would like to make sure that after the routine actions of my iframe are carried out, a popup appears in which I ask the customer to insert their email. Now creating the popup in js does not scare me, however I would like to save the email entered by the user inside a table of my db. How can I make sure that at the click of a button created in js some data is passed to the bubble db?

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Look at the free Toolbox plugin, which allows passing returns from JS to Bubble.