Fields

A field is a piece of information that can be requested in a selection set. In the above query, githubStars, chapter, and title are all fields. The first two are top-level fields (in the outer selection set, at the first level of indentation), and they’re called root query fields. Similarly, viewedSection in the document below is a root mutation field:

mutation ViewedSectionTwo {
  viewedSection(id: "0-2") {
    ...sectionData
  }
}