"param $slug referenced, but not provided"

Question

when I try to fetch data inside sanity vision, I get this error:

param $slug referenced, but not provided
*[_type == "post" && slug.current == $slug][0]{
-------------------------------------^^^^
Line:   0
Column: 37

this is the SS of the sanity vision

Answer 1

In the PARAMS panel in the bottom-left, you’ll want to specify a slug param.

{
  “slug”: “some-slug”
}