Hi Abduerhman,

Serialize the list using the JSON Serialize action from the left panel and use its output as a text input of the JavaScript block:

Kind Regards,
João

Hi @abderhman salama,

To pass the list to client function through the expression.

First store the list items in local variable(List)

Then pass the list to client function as shown below

Oml is also attached for reference.

Regards
Krishnanand Pathak

Hi @Abduerhman Salama 

Create an action of function = Yes and create an input parameter of Text List type

Then from your screen pass the same type of variable in your function from expression, like this -

I hope it'll help you,

Thanks

Deep