diff --git a/docs/generators/typescript-axios.md b/docs/generators/typescript-axios.md
index bc8f8fe04274..cd045987765e 100644
--- a/docs/generators/typescript-axios.md
+++ b/docs/generators/typescript-axios.md
@@ -27,6 +27,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |enumPropertyNaming|Naming convention for enum properties: 'camelCase', 'PascalCase', 'snake_case', 'UPPERCASE', and 'original'| |PascalCase|
 |enumPropertyNamingReplaceSpecialChar|Set to true to replace '-' and '+' symbols with 'minus_' and 'plus_' in enum of type string| |false|
 |enumUnknownDefaultCase|If the server adds new enum cases, that are unknown by an old spec/client, the client will fail to parse the network response.With this option enabled, each enum will have a new case, 'unknown_default_open_api', so that when the server sends an enum case that is not known by the client/spec, they can safely fallback to this case.|<dl><dt>**false**</dt><dd>No changes to the enum's are made, this is the default option.</dd><dt>**true**</dt><dd>With this option enabled, each enum will have a new case, 'unknown_default_open_api', so that when the enum case sent by the server is not known by the client/spec, can safely be decoded to this case.</dd></dl>|false|
+|importFileExtension|File extension to use with relative imports. Set it to '.js' or '.mjs' when using [ESM](https://nodejs.org/api/esm.html).| ||
 |legacyDiscriminatorBehavior|Set to false for generators with better support for discriminators. (Python, Java, Go, PowerShell, C# have this enabled by default).|<dl><dt>**true**</dt><dd>The mapping in the discriminator includes descendent schemas that allOf inherit from self and the discriminator mapping schemas in the OAS document.</dd><dt>**false**</dt><dd>The mapping in the discriminator includes any descendent schemas that allOf inherit from self, any oneOf schemas, any anyOf schemas, any x-discriminator-values, and the discriminator mapping schemas in the OAS document AND Codegen validates that oneOf and anyOf schemas contain the required discriminator and throws an error if the discriminator is missing.</dd></dl>|true|
 |licenseName|The name of the license| |Unlicense|
 |modelPackage|package for generated models| |null|
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptAxiosClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptAxiosClientCodegen.java
index 7988c5268b00..53580ea51627 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptAxiosClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptAxiosClientCodegen.java
@@ -47,6 +47,8 @@ public class TypeScriptAxiosClientCodegen extends AbstractTypeScriptClientCodege
     public static final String WITH_NODE_IMPORTS = "withNodeImports";
     public static final String STRING_ENUMS = "stringEnums";
     public static final String STRING_ENUMS_DESC = "Generate string enums instead of objects for enum values.";
+    public static final String IMPORT_FILE_EXTENSION_SWITCH = "importFileExtension";
+    public static final String IMPORT_FILE_EXTENSION_SWITCH_DESC = "File extension to use with relative imports. Set it to '.js' or '.mjs' when using [ESM](https://nodejs.org/api/esm.html).";
     public static final String USE_SQUARE_BRACKETS_IN_ARRAY_NAMES = "useSquareBracketsInArrayNames";
     public static final String AXIOS_VERSION = "axiosVersion";
     public static final String DEFAULT_AXIOS_VERSION = "^1.6.1";
@@ -54,6 +56,7 @@ public class TypeScriptAxiosClientCodegen extends AbstractTypeScriptClientCodege
     @Getter @Setter
     protected String npmRepository = null;
     protected Boolean stringEnums = false;
+    protected String importFileExtension = "";
 
     @Getter @Setter
     protected String axiosVersion = DEFAULT_AXIOS_VERSION;
@@ -88,6 +91,7 @@ public TypeScriptAxiosClientCodegen() {
         this.cliOptions.add(new CliOption(USE_SINGLE_REQUEST_PARAMETER, "Setting this property to true will generate functions with a single argument containing all API endpoint parameters instead of one argument per parameter.", SchemaTypeUtil.BOOLEAN_TYPE).defaultValue(Boolean.FALSE.toString()));
         this.cliOptions.add(new CliOption(WITH_NODE_IMPORTS, "Setting this property to true adds imports for NodeJS", SchemaTypeUtil.BOOLEAN_TYPE).defaultValue(Boolean.FALSE.toString()));
         this.cliOptions.add(new CliOption(STRING_ENUMS, STRING_ENUMS_DESC).defaultValue(String.valueOf(this.stringEnums)));
+        this.cliOptions.add(new CliOption(IMPORT_FILE_EXTENSION_SWITCH, IMPORT_FILE_EXTENSION_SWITCH_DESC, SchemaTypeUtil.STRING_TYPE).defaultValue(this.importFileExtension));
         this.cliOptions.add(new CliOption(USE_SQUARE_BRACKETS_IN_ARRAY_NAMES, "Setting this property to true will add brackets to array attribute names, e.g. my_values[].", SchemaTypeUtil.BOOLEAN_TYPE).defaultValue(Boolean.FALSE.toString()));
         this.cliOptions.add(new CliOption(AXIOS_VERSION, "Use this property to override the axios version in package.json").defaultValue(DEFAULT_AXIOS_VERSION));
         // Templates have no mapping between formatted property names and original base names so use only "original" and remove this option
@@ -162,6 +166,14 @@ public void processOpts() {
             additionalProperties.put("stringEnums", this.stringEnums);
         }
 
+        if (additionalProperties.containsKey(IMPORT_FILE_EXTENSION_SWITCH)) {
+            this.importFileExtension = additionalProperties.get(IMPORT_FILE_EXTENSION_SWITCH).toString();
+            if (!this.importFileExtension.isEmpty() && !this.importFileExtension.startsWith(".")) {
+                this.importFileExtension = "." + this.importFileExtension;
+            }
+            additionalProperties.put("importFileExtension", this.importFileExtension);
+        }
+
         if (additionalProperties.containsKey(NPM_NAME)) {
             addNpmPackageGeneration();
         }
diff --git a/modules/openapi-generator/src/main/resources/typescript-axios/api.mustache b/modules/openapi-generator/src/main/resources/typescript-axios/api.mustache
index a6a13e318204..23a8d4d6cf1b 100644
--- a/modules/openapi-generator/src/main/resources/typescript-axios/api.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-axios/api.mustache
@@ -3,7 +3,7 @@
 {{>licenseInfo}}
 
 {{^withSeparateModelsAndApi}}
-import type { Configuration } from './configuration';
+import type { Configuration } from './configuration{{importFileExtension}}';
 import type { AxiosPromise, AxiosInstance, RawAxiosRequestConfig } from 'axios';
 import globalAxios from 'axios';
 {{#withNodeImports}}
@@ -17,9 +17,9 @@ import FormData from 'form-data'
 // Some imports not used depending on template conditions
 // @ts-ignore
 import { DUMMY_BASE_URL, assertParamExists, setApiKeyToObject, setBasicAuthToObject, setBearerAuthToObject, setOAuthToObject, setSearchParams, serializeDataIfNeeded, toPathString, createRequestFunction } from './common';
-import type { RequestArgs } from './base';
+import type { RequestArgs } from './base{{importFileExtension}}';
 // @ts-ignore
-import { BASE_PATH, COLLECTION_FORMATS, BaseAPI, RequiredError, operationServerMap } from './base';
+import { BASE_PATH, COLLECTION_FORMATS, BaseAPI, RequiredError, operationServerMap } from './base{{importFileExtension}}';
 
 {{#models}}
 {{#model}}{{#isEnum}}{{>modelEnum}}{{/isEnum}}{{#oneOf}}{{#-first}}{{>modelOneOf}}{{/-first}}{{/oneOf}}{{^isEnum}}{{^oneOf}}{{>modelGeneric}}{{/oneOf}}{{/isEnum}}{{/model}}
@@ -28,6 +28,6 @@ import { BASE_PATH, COLLECTION_FORMATS, BaseAPI, RequiredError, operationServerM
 {{>apiInner}}
 {{/apis}}{{/apiInfo}}
 {{/withSeparateModelsAndApi}}{{#withSeparateModelsAndApi}}
-{{#apiInfo}}{{#apis}}{{#operations}}export * from './{{tsApiPackage}}/{{classFilename}}';
+{{#apiInfo}}{{#apis}}{{#operations}}export * from './{{tsApiPackage}}/{{classFilename}}{{importFileExtension}}';
 {{/operations}}{{/apis}}{{/apiInfo}}
 {{/withSeparateModelsAndApi}}
diff --git a/modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache b/modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache
index 48aadcbde192..f1bf3f64c841 100644
--- a/modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache
@@ -3,7 +3,7 @@
 /* eslint-disable */
 {{>licenseInfo}}
 
-import type { Configuration } from '{{apiRelativeToRoot}}configuration';
+import type { Configuration } from '{{apiRelativeToRoot}}configuration{{importFileExtension}}';
 import type { AxiosPromise, AxiosInstance, RawAxiosRequestConfig } from 'axios';
 import globalAxios from 'axios';
 {{#withNodeImports}}
@@ -16,12 +16,12 @@ import FormData from 'form-data'
 {{/withNodeImports}}
 // Some imports not used depending on template conditions
 // @ts-ignore
-import { DUMMY_BASE_URL, assertParamExists, setApiKeyToObject, setBasicAuthToObject, setBearerAuthToObject, setOAuthToObject, setSearchParams, serializeDataIfNeeded, toPathString, createRequestFunction } from '{{apiRelativeToRoot}}common';
+import { DUMMY_BASE_URL, assertParamExists, setApiKeyToObject, setBasicAuthToObject, setBearerAuthToObject, setOAuthToObject, setSearchParams, serializeDataIfNeeded, toPathString, createRequestFunction } from '{{apiRelativeToRoot}}common{{importFileExtension}}';
 // @ts-ignore
-import { BASE_PATH, COLLECTION_FORMATS, type RequestArgs, BaseAPI, RequiredError, operationServerMap } from '{{apiRelativeToRoot}}base';
+import { BASE_PATH, COLLECTION_FORMATS, type RequestArgs, BaseAPI, RequiredError, operationServerMap } from '{{apiRelativeToRoot}}base{{importFileExtension}}';
 {{#imports}}
 // @ts-ignore
-import type { {{classname}} } from '{{apiRelativeToRoot}}{{tsModelPackage}}';
+import type { {{classname}} } from '{{apiRelativeToRoot}}{{tsModelPackage}}{{importFileExtension}}';
 {{/imports}}
 {{/withSeparateModelsAndApi}}
 {{^withSeparateModelsAndApi}}
diff --git a/modules/openapi-generator/src/main/resources/typescript-axios/baseApi.mustache b/modules/openapi-generator/src/main/resources/typescript-axios/baseApi.mustache
index d14b428f686f..d469bb30e2c6 100644
--- a/modules/openapi-generator/src/main/resources/typescript-axios/baseApi.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-axios/baseApi.mustache
@@ -2,7 +2,7 @@
 /* eslint-disable */
 {{>licenseInfo}}
 
-import type { Configuration } from './configuration';
+import type { Configuration } from './configuration{{importFileExtension}}';
 // Some imports not used depending on template conditions
 // @ts-ignore
 import type { AxiosPromise, AxiosInstance, RawAxiosRequestConfig } from 'axios';
diff --git a/modules/openapi-generator/src/main/resources/typescript-axios/common.mustache b/modules/openapi-generator/src/main/resources/typescript-axios/common.mustache
index aa594015c7f9..71114e1a31bf 100755
--- a/modules/openapi-generator/src/main/resources/typescript-axios/common.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-axios/common.mustache
@@ -2,10 +2,10 @@
 /* eslint-disable */
 {{>licenseInfo}}
 
-import type { Configuration } from "./configuration";
-import type { RequestArgs } from "./base";
+import type { Configuration } from "./configuration{{importFileExtension}}";
+import type { RequestArgs } from "./base{{importFileExtension}}";
 import type { AxiosInstance, AxiosResponse } from 'axios';
-import { RequiredError } from "./base";
+import { RequiredError } from "./base{{importFileExtension}}";
 {{#withNodeImports}}
 import { URL, URLSearchParams } from 'url';
 {{/withNodeImports}}
@@ -81,17 +81,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/modules/openapi-generator/src/main/resources/typescript-axios/index.mustache b/modules/openapi-generator/src/main/resources/typescript-axios/index.mustache
index b8e9eb606e63..ab51dce618c4 100644
--- a/modules/openapi-generator/src/main/resources/typescript-axios/index.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-axios/index.mustache
@@ -2,6 +2,6 @@
 /* eslint-disable */
 {{>licenseInfo}}
 
-export * from "./api";
-export * from "./configuration";
-{{#withSeparateModelsAndApi}}export * from "./{{tsModelPackage}}";{{/withSeparateModelsAndApi}}
+export * from "./api{{importFileExtension}}";
+export * from "./configuration{{importFileExtension}}";
+{{#withSeparateModelsAndApi}}export * from "./{{tsModelPackage}}{{importFileExtension}}";{{/withSeparateModelsAndApi}}
diff --git a/modules/openapi-generator/src/main/resources/typescript-axios/model.mustache b/modules/openapi-generator/src/main/resources/typescript-axios/model.mustache
index 4ec53a6c405d..d9ab0b19d33a 100644
--- a/modules/openapi-generator/src/main/resources/typescript-axios/model.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-axios/model.mustache
@@ -4,13 +4,13 @@
 {{#withSeparateModelsAndApi}}{{#hasAllOf}}{{#allOf}}
 // May contain unused imports in some cases
 // @ts-ignore
-import type { {{class}} } from './{{filename}}';{{/allOf}}{{/hasAllOf}}{{#hasOneOf}}{{#oneOf}}
+import type { {{class}} } from './{{filename}}{{importFileExtension}}';{{/allOf}}{{/hasAllOf}}{{#hasOneOf}}{{#oneOf}}
 // May contain unused imports in some cases
 // @ts-ignore
-import type { {{class}} } from './{{filename}}';{{/oneOf}}{{/hasOneOf}}{{^hasAllOf}}{{^hasOneOf}}{{#imports}}
+import type { {{class}} } from './{{filename}}{{importFileExtension}}';{{/oneOf}}{{/hasOneOf}}{{^hasAllOf}}{{^hasOneOf}}{{#imports}}
 // May contain unused imports in some cases
 // @ts-ignore
-import type { {{class}} } from './{{filename}}';{{/imports}}{{/hasOneOf}}{{/hasAllOf}}{{/withSeparateModelsAndApi}}
+import type { {{class}} } from './{{filename}}{{importFileExtension}}';{{/imports}}{{/hasOneOf}}{{/hasAllOf}}{{/withSeparateModelsAndApi}}
 {{#models}}{{#model}}
 {{#isEnum}}{{>modelEnum}}{{/isEnum}}{{#oneOf}}{{#-first}}{{>modelOneOf}}{{/-first}}{{/oneOf}}{{#allOf}}{{#-first}}{{>modelAllOf}}{{/-first}}{{/allOf}}{{^isEnum}}{{^oneOf}}{{^allOf}}{{>modelGeneric}}{{/allOf}}{{/oneOf}}{{/isEnum}}
 {{/model}}{{/models}}
diff --git a/modules/openapi-generator/src/main/resources/typescript-axios/modelIndex.mustache b/modules/openapi-generator/src/main/resources/typescript-axios/modelIndex.mustache
index 947111206c59..7b40cb45cd83 100644
--- a/modules/openapi-generator/src/main/resources/typescript-axios/modelIndex.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-axios/modelIndex.mustache
@@ -1,2 +1,2 @@
-{{#models}}{{#model}}export * from './{{classFilename}}';{{/model}}
+{{#models}}{{#model}}export * from './{{classFilename}}{{importFileExtension}}';{{/model}}
 {{/models}}
\ No newline at end of file
diff --git a/samples/client/echo_api/typescript-axios/build/common.ts b/samples/client/echo_api/typescript-axios/build/common.ts
index fc1881f27b35..5c8ff6b1c1aa 100644
--- a/samples/client/echo_api/typescript-axios/build/common.ts
+++ b/samples/client/echo_api/typescript-axios/build/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/others/typescript-axios/with-separate-models-and-api-inheritance/common.ts b/samples/client/others/typescript-axios/with-separate-models-and-api-inheritance/common.ts
index 95d62a0dcddb..7248f940d129 100644
--- a/samples/client/others/typescript-axios/with-separate-models-and-api-inheritance/common.ts
+++ b/samples/client/others/typescript-axios/with-separate-models-and-api-inheritance/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/petstore/typescript-axios/builds/composed-schemas/common.ts b/samples/client/petstore/typescript-axios/builds/composed-schemas/common.ts
index d629dec4427f..b2e7c457aaf7 100644
--- a/samples/client/petstore/typescript-axios/builds/composed-schemas/common.ts
+++ b/samples/client/petstore/typescript-axios/builds/composed-schemas/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/petstore/typescript-axios/builds/default/common.ts b/samples/client/petstore/typescript-axios/builds/default/common.ts
index d5b9e4718aea..e6be09b1fdd6 100644
--- a/samples/client/petstore/typescript-axios/builds/default/common.ts
+++ b/samples/client/petstore/typescript-axios/builds/default/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/petstore/typescript-axios/builds/es6-target/common.ts b/samples/client/petstore/typescript-axios/builds/es6-target/common.ts
index d5b9e4718aea..e6be09b1fdd6 100644
--- a/samples/client/petstore/typescript-axios/builds/es6-target/common.ts
+++ b/samples/client/petstore/typescript-axios/builds/es6-target/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/petstore/typescript-axios/builds/test-petstore/common.ts b/samples/client/petstore/typescript-axios/builds/test-petstore/common.ts
index c0f62a7b6df1..aa331b45fe27 100644
--- a/samples/client/petstore/typescript-axios/builds/test-petstore/common.ts
+++ b/samples/client/petstore/typescript-axios/builds/test-petstore/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/petstore/typescript-axios/builds/with-complex-headers/common.ts b/samples/client/petstore/typescript-axios/builds/with-complex-headers/common.ts
index d5b9e4718aea..e6be09b1fdd6 100644
--- a/samples/client/petstore/typescript-axios/builds/with-complex-headers/common.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-complex-headers/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/petstore/typescript-axios/builds/with-fake-endpoints-models-for-testing-with-http-signature/common.ts b/samples/client/petstore/typescript-axios/builds/with-fake-endpoints-models-for-testing-with-http-signature/common.ts
index c0f62a7b6df1..aa331b45fe27 100644
--- a/samples/client/petstore/typescript-axios/builds/with-fake-endpoints-models-for-testing-with-http-signature/common.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-fake-endpoints-models-for-testing-with-http-signature/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/petstore/typescript-axios/builds/with-interfaces-and-with-single-request-param/common.ts b/samples/client/petstore/typescript-axios/builds/with-interfaces-and-with-single-request-param/common.ts
index d5b9e4718aea..e6be09b1fdd6 100644
--- a/samples/client/petstore/typescript-axios/builds/with-interfaces-and-with-single-request-param/common.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-interfaces-and-with-single-request-param/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/petstore/typescript-axios/builds/with-interfaces/common.ts b/samples/client/petstore/typescript-axios/builds/with-interfaces/common.ts
index d5b9e4718aea..e6be09b1fdd6 100644
--- a/samples/client/petstore/typescript-axios/builds/with-interfaces/common.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-interfaces/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/petstore/typescript-axios/builds/with-node-imports/common.ts b/samples/client/petstore/typescript-axios/builds/with-node-imports/common.ts
index a88b97565783..dbdacb60f824 100644
--- a/samples/client/petstore/typescript-axios/builds/with-node-imports/common.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-node-imports/common.ts
@@ -90,17 +90,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/petstore/typescript-axios/builds/with-npm-version-and-separate-models-and-api/common.ts b/samples/client/petstore/typescript-axios/builds/with-npm-version-and-separate-models-and-api/common.ts
index d5b9e4718aea..e6be09b1fdd6 100644
--- a/samples/client/petstore/typescript-axios/builds/with-npm-version-and-separate-models-and-api/common.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-npm-version-and-separate-models-and-api/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/petstore/typescript-axios/builds/with-npm-version/common.ts b/samples/client/petstore/typescript-axios/builds/with-npm-version/common.ts
index d5b9e4718aea..e6be09b1fdd6 100644
--- a/samples/client/petstore/typescript-axios/builds/with-npm-version/common.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-npm-version/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/petstore/typescript-axios/builds/with-single-request-parameters/common.ts b/samples/client/petstore/typescript-axios/builds/with-single-request-parameters/common.ts
index d5b9e4718aea..e6be09b1fdd6 100644
--- a/samples/client/petstore/typescript-axios/builds/with-single-request-parameters/common.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-single-request-parameters/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }
diff --git a/samples/client/petstore/typescript-axios/builds/with-string-enums/common.ts b/samples/client/petstore/typescript-axios/builds/with-string-enums/common.ts
index d5b9e4718aea..e6be09b1fdd6 100644
--- a/samples/client/petstore/typescript-axios/builds/with-string-enums/common.ts
+++ b/samples/client/petstore/typescript-axios/builds/with-string-enums/common.ts
@@ -89,17 +89,17 @@ function setFlattenedQueryParams(urlSearchParams: URLSearchParams, parameter: an
     if (typeof parameter === "object") {
         if (Array.isArray(parameter)) {
             (parameter as any[]).forEach(item => setFlattenedQueryParams(urlSearchParams, item, key));
-        } 
+        }
         else {
-            Object.keys(parameter).forEach(currentKey => 
+            Object.keys(parameter).forEach(currentKey =>
                 setFlattenedQueryParams(urlSearchParams, parameter[currentKey], `${key}${key !== '' ? '.' : ''}${currentKey}`)
             );
         }
-    } 
+    }
     else {
         if (urlSearchParams.has(key)) {
             urlSearchParams.append(key, parameter);
-        } 
+        }
         else {
             urlSearchParams.set(key, parameter);
         }