Custom Field Event w/ Data?

Is it possible for a custom field to trigger an event along with some data to use in populating other fields. For example, I have a 'title" field that I'm building that will search the Shopify API for a product title, but once the user selects the title, I'd also like that custom field to send the price and sku for the product up to the "updated" closure or something similar so that I can fill the price and sku fields in the form. Is this possible?
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