asleekgeek · pull · Sep 15, 2025 · Sep 15, 2025 · Sep 15, 2025 · Sep 15, 2025
diff --git a/dev-test/gql-tag-operations-masking/gql/graphql.ts b/dev-test/gql-tag-operations-masking/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/dev-test/gql-tag-operations-urql/gql/graphql.ts b/dev-test/gql-tag-operations-urql/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/dev-test/gql-tag-operations/gql/graphql.ts b/dev-test/gql-tag-operations/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/dev-test/gql-tag-operations/graphql/graphql.ts b/dev-test/gql-tag-operations/graphql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/persisted-documents-string-mode/src/gql/graphql.ts b/examples/persisted-documents-string-mode/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { DocumentTypeDecoration } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/persisted-documents/src/gql/graphql.ts b/examples/persisted-documents/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/react/apollo-client-defer/src/gql/graphql.ts b/examples/react/apollo-client-defer/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/react/apollo-client-swc-plugin/src/gql/graphql.ts b/examples/react/apollo-client-swc-plugin/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/react/apollo-client/src/gql/graphql.ts b/examples/react/apollo-client/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/react/http-executor/src/gql/graphql.ts b/examples/react/http-executor/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/react/nextjs-swr/gql/graphql.ts b/examples/react/nextjs-swr/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/react/tanstack-react-query/src/gql/graphql.ts b/examples/react/tanstack-react-query/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { DocumentTypeDecoration } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/react/urql/src/gql/graphql.ts b/examples/react/urql/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { DocumentTypeDecoration } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/typescript-esm/src/gql/graphql.ts b/examples/typescript-esm/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/typescript-graphql-request/src/gql/graphql.ts b/examples/typescript-graphql-request/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { DocumentTypeDecoration } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/vite/vite-react-cts/src/gql/graphql.ts b/examples/vite/vite-react-cts/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/vite/vite-react-mts/src/gql/graphql.ts b/examples/vite/vite-react-mts/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/vite/vite-react-ts/src/gql/graphql.ts b/examples/vite/vite-react-ts/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/vue/apollo-composable/src/gql/graphql.ts b/examples/vue/apollo-composable/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import type { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/vue/urql/src/gql/graphql.ts b/examples/vue/urql/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import type { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/vue/villus/src/gql/graphql.ts b/examples/vue/villus/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import type { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/examples/yoga-tests/src/gql/graphql.ts b/examples/yoga-tests/src/gql/graphql.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 import { TypedDocumentNode as DocumentNode } from '@graphql-typed-document-node/core';
 export type Maybe<T> = T | null;
-export type InputMaybe<T> = Maybe<T>;
+export type InputMaybe<T> = T | null | undefined;
 export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
 export type MakeOptional<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]?: Maybe<T[SubKey]> };
 export type MakeMaybe<T, K extends keyof T> = Omit<T, K> & { [SubKey in K]: Maybe<T[SubKey]> };

diff --git a/packages/presets/client/CHANGELOG.md b/packages/presets/client/CHANGELOG.md
@@ -1,5 +1,11 @@
 # @graphql-codegen/client-preset
 
+## 5.0.1
+
+### Patch Changes
+
+- [#10393](https://github.com/dotansimha/graphql-code-generator/pull/10393) [`ee2276c`](https://github.com/dotansimha/graphql-code-generator/commit/ee2276cb073a87458eda957a17c9e296c1cf313a) Thanks [@eddeee888](https://github.com/eddeee888)! - Include undefined explicitly for input maybe value in Client Preset
+
 ## 5.0.0
 
 ### Major Changes

diff --git a/packages/presets/client/package.json b/packages/presets/client/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@graphql-codegen/client-preset",
-  "version": "5.0.0",
+  "version": "5.0.1",
   "description": "GraphQL Code Generator preset for client.",
   "repository": {
     "type": "git",

diff --git a/packages/presets/client/src/index.ts b/packages/presets/client/src/index.ts
@@ -220,7 +220,11 @@ export const preset: Types.OutputPreset<ClientPresetConfig> = {
 
     const plugins: Array<Types.ConfiguredPlugin> = [
       { [`add`]: { content: `/* eslint-disable */` } },
-      { [`typescript`]: {} },
+      {
+        [`typescript`]: {
+          inputMaybeValue: 'T | null | undefined',
+        },
+      },
       { [`typescript-operations`]: {} },
       {
         [`typed-document-node`]: {