Hi @peterpolman
I have attached initial patch, it is working partially. Howev...

Hi @peterpolman
I have attached initial patch, it is working partially. However, i need some inputs from you.
I have used following approach:
- In form alter, get the value of form field and run it through field processor
- Pass processed value in js as drupalSettings
- In js set value using .val() jquery function.

P.S. Right now i've build kind of idea about approach, currently i am figuring out about making it generic so it should work for any fields.