Sanity query filter by category or tags (Groq Snippet)

*[_type == "posts" && $keyword in categories[]->slug.current] {
  ...,
  categories[] -> {
          title,
          slug
  },
}

// Params
{
"keyword": "general"
}

*[_type == "posts" && $keyword in tags[].label] {
  ...,
}

// Params
{
"keyword": "sanity"
}