From adab279e569186eee15bc3a23787b03dcbcb367b Mon Sep 17 00:00:00 2001
From: Marcel Konrad <Marcel.Konrad@tib.eu>
Date: Thu, 11 Jun 2026 11:46:36 +0200
Subject: [PATCH 1/2] Replace equality check with startsWith call

---
 .../src/main/resources/typescript-fetch/runtime.mustache        | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/openapi-generator/src/main/resources/typescript-fetch/runtime.mustache b/modules/openapi-generator/src/main/resources/typescript-fetch/runtime.mustache
index 00ca3b3ee0ac..88574cad021d 100644
--- a/modules/openapi-generator/src/main/resources/typescript-fetch/runtime.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-fetch/runtime.mustache
@@ -361,7 +361,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }

From 9a9ca47dbd79d41d7116d0417dd63938ca87b8dc Mon Sep 17 00:00:00 2001
From: Marcel Konrad <Marcel.Konrad@tib.eu>
Date: Thu, 11 Jun 2026 11:50:17 +0200
Subject: [PATCH 2/2] Update examples

---
 .../additional-properties-in-multipart-issue/runtime.ts         | 2 +-
 .../others/typescript-fetch/infinite-recursion-issue/runtime.ts | 2 +-
 .../client/others/typescript-fetch/self-import-issue/runtime.ts | 2 +-
 .../petstore/typescript-fetch/builds/allOf-nullable/runtime.ts  | 2 +-
 .../petstore/typescript-fetch/builds/allOf-readonly/runtime.ts  | 2 +-
 .../petstore/typescript-fetch/builds/default-v3.0/runtime.ts    | 2 +-
 .../client/petstore/typescript-fetch/builds/default/runtime.ts  | 2 +-
 samples/client/petstore/typescript-fetch/builds/enum/runtime.ts | 2 +-
 .../petstore/typescript-fetch/builds/es6-target/src/runtime.ts  | 2 +-
 .../typescript-fetch/builds/multiple-parameters/runtime.ts      | 2 +-
 .../client/petstore/typescript-fetch/builds/oneOf/runtime.ts    | 2 +-
 .../builds/prefix-parameter-interfaces/src/runtime.ts           | 2 +-
 .../typescript-fetch/builds/sagas-and-records/src/runtime.ts    | 2 +-
 .../typescript-fetch/builds/snakecase-discriminator/runtime.ts  | 2 +-
 .../typescript-fetch/builds/validation-attributes/runtime.ts    | 2 +-
 .../petstore/typescript-fetch/builds/with-interfaces/runtime.ts | 2 +-
 .../typescript-fetch/builds/with-npm-version/src/runtime.ts     | 2 +-
 .../typescript-fetch/builds/with-string-enums/runtime.ts        | 2 +-
 .../builds/without-runtime-checks/src/runtime.ts                | 2 +-
 19 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/samples/client/others/typescript-fetch/additional-properties-in-multipart-issue/runtime.ts b/samples/client/others/typescript-fetch/additional-properties-in-multipart-issue/runtime.ts
index 3d76171ffb1b..5ff28bda9b85 100644
--- a/samples/client/others/typescript-fetch/additional-properties-in-multipart-issue/runtime.ts
+++ b/samples/client/others/typescript-fetch/additional-properties-in-multipart-issue/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/others/typescript-fetch/infinite-recursion-issue/runtime.ts b/samples/client/others/typescript-fetch/infinite-recursion-issue/runtime.ts
index 3d76171ffb1b..5ff28bda9b85 100644
--- a/samples/client/others/typescript-fetch/infinite-recursion-issue/runtime.ts
+++ b/samples/client/others/typescript-fetch/infinite-recursion-issue/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/others/typescript-fetch/self-import-issue/runtime.ts b/samples/client/others/typescript-fetch/self-import-issue/runtime.ts
index 28a75aaa78bc..0fdb285eb3e3 100644
--- a/samples/client/others/typescript-fetch/self-import-issue/runtime.ts
+++ b/samples/client/others/typescript-fetch/self-import-issue/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/allOf-nullable/runtime.ts b/samples/client/petstore/typescript-fetch/builds/allOf-nullable/runtime.ts
index 7999e6060c25..d026886681df 100644
--- a/samples/client/petstore/typescript-fetch/builds/allOf-nullable/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/allOf-nullable/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/allOf-readonly/runtime.ts b/samples/client/petstore/typescript-fetch/builds/allOf-readonly/runtime.ts
index 7999e6060c25..d026886681df 100644
--- a/samples/client/petstore/typescript-fetch/builds/allOf-readonly/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/allOf-readonly/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/default-v3.0/runtime.ts b/samples/client/petstore/typescript-fetch/builds/default-v3.0/runtime.ts
index 750df2544f71..a37b33ee1f0c 100644
--- a/samples/client/petstore/typescript-fetch/builds/default-v3.0/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/default-v3.0/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/default/runtime.ts b/samples/client/petstore/typescript-fetch/builds/default/runtime.ts
index 74e3e02cb684..54253e345bd3 100644
--- a/samples/client/petstore/typescript-fetch/builds/default/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/default/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/enum/runtime.ts b/samples/client/petstore/typescript-fetch/builds/enum/runtime.ts
index 57a7edbddbbf..b21f204f79d0 100644
--- a/samples/client/petstore/typescript-fetch/builds/enum/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/enum/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/es6-target/src/runtime.ts b/samples/client/petstore/typescript-fetch/builds/es6-target/src/runtime.ts
index 74e3e02cb684..54253e345bd3 100644
--- a/samples/client/petstore/typescript-fetch/builds/es6-target/src/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/es6-target/src/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/multiple-parameters/runtime.ts b/samples/client/petstore/typescript-fetch/builds/multiple-parameters/runtime.ts
index 74e3e02cb684..54253e345bd3 100644
--- a/samples/client/petstore/typescript-fetch/builds/multiple-parameters/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/multiple-parameters/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/oneOf/runtime.ts b/samples/client/petstore/typescript-fetch/builds/oneOf/runtime.ts
index 58da18194286..b6e077dfda49 100644
--- a/samples/client/petstore/typescript-fetch/builds/oneOf/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/oneOf/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/runtime.ts b/samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/runtime.ts
index 74e3e02cb684..54253e345bd3 100644
--- a/samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/runtime.ts b/samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/runtime.ts
index 74e3e02cb684..54253e345bd3 100644
--- a/samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/snakecase-discriminator/runtime.ts b/samples/client/petstore/typescript-fetch/builds/snakecase-discriminator/runtime.ts
index 750df2544f71..a37b33ee1f0c 100644
--- a/samples/client/petstore/typescript-fetch/builds/snakecase-discriminator/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/snakecase-discriminator/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/validation-attributes/runtime.ts b/samples/client/petstore/typescript-fetch/builds/validation-attributes/runtime.ts
index 74e3e02cb684..54253e345bd3 100644
--- a/samples/client/petstore/typescript-fetch/builds/validation-attributes/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/validation-attributes/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/with-interfaces/runtime.ts b/samples/client/petstore/typescript-fetch/builds/with-interfaces/runtime.ts
index 74e3e02cb684..54253e345bd3 100644
--- a/samples/client/petstore/typescript-fetch/builds/with-interfaces/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/with-interfaces/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/with-npm-version/src/runtime.ts b/samples/client/petstore/typescript-fetch/builds/with-npm-version/src/runtime.ts
index 74e3e02cb684..54253e345bd3 100644
--- a/samples/client/petstore/typescript-fetch/builds/with-npm-version/src/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/with-npm-version/src/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/with-string-enums/runtime.ts b/samples/client/petstore/typescript-fetch/builds/with-string-enums/runtime.ts
index 57a7edbddbbf..b21f204f79d0 100644
--- a/samples/client/petstore/typescript-fetch/builds/with-string-enums/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/with-string-enums/runtime.ts
@@ -369,7 +369,7 @@ export function mapValues(data: any, fn: (item: any) => any) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }
diff --git a/samples/client/petstore/typescript-fetch/builds/without-runtime-checks/src/runtime.ts b/samples/client/petstore/typescript-fetch/builds/without-runtime-checks/src/runtime.ts
index eec469e2c33f..45dfc650f077 100644
--- a/samples/client/petstore/typescript-fetch/builds/without-runtime-checks/src/runtime.ts
+++ b/samples/client/petstore/typescript-fetch/builds/without-runtime-checks/src/runtime.ts
@@ -362,7 +362,7 @@ export function exists(json: any, key: string) {
 
 export function canConsumeForm(consumes: Consume[]): boolean {
     for (const consume of consumes) {
-        if ('multipart/form-data' === consume.contentType) {
+        if (consume.contentType?.startsWith('multipart/form-data') == true) {
             return true;
         }
     }