Function $exists

Matches documents that have the specified field.

$exists(selector, value, options): ((obj: AnyObject) => boolean)
Parameters
- selector: string
- value: unknown
- options: Options
Returns ((obj: AnyObject) => boolean)
- - (obj): boolean
  - Parameters
    - obj: AnyObject
    Returns boolean
- Defined in src/operators/query/element/exists.ts:8