@sanity/types/src/documents/asserters.ts

Type definitions for common Sanity data structures

import {isObject} from '../helpers'
import {type KeyedObject, type SanityDocument, type TypedObject} from './types'

/** @public */
export function isSanityDocument(document: unknown): document is SanityDocument {
  return (
    isObject(document) && typeof document._id === 'string' && typeof document._type === 'string'
  )
}

/** @public */
export function isTypedObject(obj: unknown): obj is TypedObject {
  return isObject(obj) && typeof obj._type === 'string'
}

/** @public */
export function isKeyedObject(obj: unknown): obj is KeyedObject {
  return isObject(obj) && typeof obj._key === 'string'
}