How to add custom corvid code to filter data in Shop page of Wix-Store App?

Hi Legends ,

I have done some filter functionalities in my website for repeater/form.
It still working fine.
I want to put some logic for wix- store app’s Filter (In Shop Page).


Where to put my code ?
Ex:
I want to filter for Stock / Out Of Stock .
I can query data and in result i can search for field Stock field .
But I dont know where we can put our code ?

In Wix - Store app , Shop page (In build to wix Store APP).

Can anyone help me Out ?

Here,
In that custom filter i can create a collection then i can show that particular products only.
Thanks in advance :slight_smile: