Updated types

src/dynamic-navigations.ts

@@ -1,7 +1,9 @@
-import { Type } from '@nestjs/common'
+import type { Type } from '@nestjs/common'
 
 import { toCamelCase } from './helpers'
 
+import type { KeysMatching } from './types'
+
 let _navigations: INavigationMap[] | undefined
 
 /**

src/dynamic-resolvers.ts

@@ -1,4 +1,4 @@
-import { GraphQLResolveInfo } from 'graphql'
+import type { GraphQLResolveInfo } from 'graphql'
 
 import { Inject, Type } from '@nestjs/common'
 import {
@@ -23,6 +23,8 @@ import {
   toCamelCase,
 } from './helpers'
 
+import type { Dictionary } from './types'
+
 let _resolverParams: IRegisterDynamicResolverParams[] | undefined
 
 export interface IOnResolvingParams<P extends object = object, TRoot extends object = object> {

src/helpers/extract-grapql-selections.ts

@@ -1,5 +1,7 @@
 import { FieldNode, GraphQLResolveInfo, Kind } from 'graphql'
 
+import type { ObjectKeys, KeysMatching } from '../types'
+
 /**
  * Defines how the fields should be renamed/mapped.
  *

src/index.ts

@@ -1,6 +1,5 @@
-import '../types'
-
 export * from './dynamic-navigations'
+
 export {
   extractGraphQLSelectionPath,
   extractGraphQLSelections,

types.d.ts → src/types.ts

@@ -1,19 +1,24 @@
+/**
+ * The function interface.
+ */
+export type Func<A extends any[] = any[], R = any> = (...args: A) => R
+
 /**
  * Gets the keys of type `T` matching the `V` values.
  */
-declare type KeysMatching<T, V> = { [ K in keyof T ]-?: T[ K ] extends V ? K : never }[ keyof T ]
+export type KeysMatching<T, V> = { [ K in keyof T ]-?: T[ K ] extends V ? K : never }[ keyof T ]
 
 /**
  * A Dictionary type for keeping `TValue` values.
  */
-declare type Dictionary<TValue> = { [ key: string ]: TValue }
+export type Dictionary<TValue> = { [ key: string ]: TValue }
 
 /**
  * Maps the given type to its function keys.
  * If the given type is an array, then the function indices will be returned.
  * If the given type is an object, then the function keys will be returned.
  */
-declare type FunctionKeys<T>
+export type FunctionKeys<T>
   = T extends any[]
   ? Exclude<_FunctionKeys<T>, -1>
   : T extends { [ key: string ]: any }
@@ -23,43 +28,43 @@ declare type FunctionKeys<T>
 /**
  * Defines the nullable version of given type.
  */
-declare type Nullable<T> = T | null | undefined
+export type Nullable<T> = T | null | undefined
 
 /**
  * Defines the nullable version of given type with `void` type.
  */
-declare type NullableReturn<T> = Nullable<T> | void
+export type NullableReturn<T> = Nullable<T> | void
 
 /**
  * Defines a type which can be in a promise or not.
  */
-declare type MaybePromise<T> = Promise<T> | T
+export type MaybePromise<T> = Promise<T> | T
 
 /**
  * Gets the keys of an object whose values are objects.
  *
  * This does not include function keys.
  */
-declare type ObjectKeys<T extends object>
+export type ObjectKeys<T extends object>
   = Exclude<KeysMatching<T, object>, FunctionKeys<T>>
 
 /**
  * Gets the length of an array.
  */
-declare type Length<T extends any[]> = T extends { length: infer L } ? L : never
+export type Length<T extends any[]> = T extends { length: infer L } ? L : never
 
 /**
 * Builds a tuple with given length.
 */
-declare type BuildTuple<L extends number, T extends any[] = []>
+export type BuildTuple<L extends number, T extends any[] = []>
   = T extends { length: L } ? T : BuildTuple<L, [ ...T, any ]>
 
-type _FunctionKeys<TArray extends any[], CurrentIndex = 0, Index = -1>
+type _FunctionKeys<TArray extends any[], CurrentIndex extends number = 0, Index = -1>
   = TArray extends [ infer H, ...infer T ]
   ? H extends Func
   ? _FunctionKeys<T, Add<CurrentIndex, 1>, Index | CurrentIndex>
   : _FunctionKeys<T, Add<CurrentIndex, 1>, Index>
   : Index
 
 type Add<A extends number, B extends number> =
-  Length<[ ...BuildTuple<A>, ...BuildTuple<B> ]>
+  Length<[ ...BuildTuple<A>, ...BuildTuple<B> ]> & number

tsconfig.json

@@ -16,7 +16,10 @@
     "forceConsistentCasingInFileNames": true,
     "strict": true,
     "skipDefaultLibCheck": true,
-    "skipLibCheck": true
+    "skipLibCheck": true,
+    "lib": [
+      "ES2015"
+    ]
   },
   "exclude": [
     "node_modules",