Is there an api or function to insert a value in a data-attribute in the canvas?

Hey Grapes Community! I created a custom trait select field that fetches options from our db for <a> components... when <a>(link) is clicked in canvas, component settings displays and our select field is rendered...

I am looking for a solution to pass the selected value from our custom select field to the canvas. And to get value in canvas to insert in custom select field when component is clicked in canvas.

Thanks in advance