From 08119634a22f1d5b19f5c9ea0adccb6d3eebc3bc Mon Sep 17 00:00:00 2001
From: Dmitriy Mozgovoy <robotshara@gmail.com>
Date: Fri, 6 Jan 2023 02:02:08 +0200
Subject: [PATCH] fix(types): fixed AxiosRequestConfig header interface by
 refactoring it to RawAxiosRequestConfig; (#5420)

---
 index.d.cts                      |  42 ++---
 index.d.ts                       |  42 ++---
 test/module/test.js              | 117 +++++++-------
 test/module/typings/cjs/index.ts |   6 +-
 test/module/typings/esm/index.ts | 264 ++++++++++++++++---------------
 5 files changed, 245 insertions(+), 226 deletions(-)

diff --git a/index.d.cts b/index.d.cts
index 844cda67b7..182532a886 100644
--- a/index.d.cts
+++ b/index.d.cts
@@ -103,24 +103,24 @@ declare class CanceledError<T> extends AxiosError<T> {
 }
 
 declare class Axios {
-  constructor(config?: axios.AxiosRequestConfig);
+  constructor(config?: axios.RawAxiosRequestConfig);
   defaults: axios.AxiosDefaults;
   interceptors: {
     request: axios.AxiosInterceptorManager<axios.AxiosRequestConfig>;
     response: axios.AxiosInterceptorManager<axios.AxiosResponse>;
   };
-  getUri(config?: axios.AxiosRequestConfig): string;
-  request<T = any, R = axios.AxiosResponse<T>, D = any>(config: axios.AxiosRequestConfig<D>): Promise<R>;
-  get<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, config?: axios.AxiosRequestConfig<D>): Promise<R>;
-  delete<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, config?: axios.AxiosRequestConfig<D>): Promise<R>;
-  head<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, config?: axios.AxiosRequestConfig<D>): Promise<R>;
-  options<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, config?: axios.AxiosRequestConfig<D>): Promise<R>;
-  post<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, data?: D, config?: axios.AxiosRequestConfig<D>): Promise<R>;
-  put<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, data?: D, config?: axios.AxiosRequestConfig<D>): Promise<R>;
-  patch<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, data?: D, config?: axios.AxiosRequestConfig<D>): Promise<R>;
-  postForm<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, data?: D, config?: axios.AxiosRequestConfig<D>): Promise<R>;
-  putForm<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, data?: D, config?: axios.AxiosRequestConfig<D>): Promise<R>;
-  patchForm<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, data?: D, config?: axios.AxiosRequestConfig<D>): Promise<R>;
+  getUri(config?: axios.RawAxiosRequestConfig): string;
+  request<T = any, R = axios.AxiosResponse<T>, D = any>(config: axios.RawAxiosRequestConfig<D>): Promise<R>;
+  get<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, config?: axios.RawAxiosRequestConfig<D>): Promise<R>;
+  delete<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, config?: axios.RawAxiosRequestConfig<D>): Promise<R>;
+  head<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, config?: axios.RawAxiosRequestConfig<D>): Promise<R>;
+  options<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, config?: axios.RawAxiosRequestConfig<D>): Promise<R>;
+  post<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, data?: D, config?: axios.RawAxiosRequestConfig<D>): Promise<R>;
+  put<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, data?: D, config?: axios.RawAxiosRequestConfig<D>): Promise<R>;
+  patch<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, data?: D, config?: axios.RawAxiosRequestConfig<D>): Promise<R>;
+  postForm<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, data?: D, config?: axios.RawAxiosRequestConfig<D>): Promise<R>;
+  putForm<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, data?: D, config?: axios.RawAxiosRequestConfig<D>): Promise<R>;
+  patchForm<T = any, R = axios.AxiosResponse<T>, D = any>(url: string, data?: D, config?: axios.RawAxiosRequestConfig<D>): Promise<R>;
 }
 
 declare enum HttpStatusCode {
@@ -342,7 +342,7 @@ declare namespace axios {
 
   type AxiosAdapterConfig = AxiosAdapter | AxiosAdapterName;
 
-  interface AxiosRequestConfig<D = any> {
+  interface RawAxiosRequestConfig<D = any> {
     url?: string;
     method?: Method | string;
     baseURL?: string;
@@ -384,6 +384,10 @@ declare namespace axios {
     formSerializer?: FormSerializerOptions;
   }
 
+  interface AxiosRequestConfig<D = any> extends RawAxiosRequestConfig {
+    headers: AxiosRequestHeaders;
+  }
+
   interface HeadersDefaults {
     common: RawAxiosRequestHeaders;
     delete: RawAxiosRequestHeaders;
@@ -398,11 +402,11 @@ declare namespace axios {
     unlink?: RawAxiosRequestHeaders;
   }
 
-  interface AxiosDefaults<D = any> extends Omit<AxiosRequestConfig<D>, 'headers'> {
+  interface AxiosDefaults<D = any> extends Omit<RawAxiosRequestConfig<D>, 'headers'> {
     headers: HeadersDefaults;
   }
 
-  interface CreateAxiosDefaults<D = any> extends Omit<AxiosRequestConfig<D>, 'headers'> {
+  interface CreateAxiosDefaults<D = any> extends Omit<RawAxiosRequestConfig<D>, 'headers'> {
     headers?: RawAxiosRequestHeaders | AxiosHeaders | Partial<HeadersDefaults>;
   }
 
@@ -426,7 +430,7 @@ declare namespace axios {
   }
 
   interface Canceler {
-    (message?: string, config?: AxiosRequestConfig, request?: any): void;
+    (message?: string, config?: RawAxiosRequestConfig, request?: any): void;
   }
 
   interface CancelTokenStatic {
@@ -457,8 +461,8 @@ declare namespace axios {
   }
 
   interface AxiosInstance extends Axios {
-    <T = any, R = AxiosResponse<T>, D = any>(config: AxiosRequestConfig<D>): Promise<R>;
-    <T = any, R = AxiosResponse<T>, D = any>(url: string, config?: AxiosRequestConfig<D>): Promise<R>;
+    <T = any, R = AxiosResponse<T>, D = any>(config: RawAxiosRequestConfig<D>): Promise<R>;
+    <T = any, R = AxiosResponse<T>, D = any>(url: string, config?: RawAxiosRequestConfig<D>): Promise<R>;
 
     defaults: Omit<AxiosDefaults, 'headers'> & {
       headers: HeadersDefaults & {
diff --git a/index.d.ts b/index.d.ts
index 35d50e3c1f..5b2b6141a0 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -283,7 +283,7 @@ type AxiosAdapterName = 'xhr' | 'http' | string;
 
 type AxiosAdapterConfig = AxiosAdapter | AxiosAdapterName;
 
-export interface AxiosRequestConfig<D = any> {
+export interface RawAxiosRequestConfig<D = any> {
   url?: string;
   method?: Method | string;
   baseURL?: string;
@@ -325,6 +325,10 @@ export interface AxiosRequestConfig<D = any> {
   formSerializer?: FormSerializerOptions;
 }
 
+export interface AxiosRequestConfig<D = any> extends RawAxiosRequestConfig {
+  headers: AxiosRequestHeaders;
+}
+
 export interface HeadersDefaults {
   common: RawAxiosRequestHeaders;
   delete: RawAxiosRequestHeaders;
@@ -339,11 +343,11 @@ export interface HeadersDefaults {
   unlink?: RawAxiosRequestHeaders;
 }
 
-export interface AxiosDefaults<D = any> extends Omit<AxiosRequestConfig<D>, 'headers'> {
+export interface AxiosDefaults<D = any> extends Omit<RawAxiosRequestConfig<D>, 'headers'> {
   headers: HeadersDefaults;
 }
 
-export interface CreateAxiosDefaults<D = any> extends Omit<AxiosRequestConfig<D>, 'headers'> {
+export interface CreateAxiosDefaults<D = any> extends Omit<RawAxiosRequestConfig<D>, 'headers'> {
   headers?: RawAxiosRequestHeaders | AxiosHeaders | Partial<HeadersDefaults>;
 }
 
@@ -409,7 +413,7 @@ export interface Cancel {
 }
 
 export interface Canceler {
-  (message?: string, config?: AxiosRequestConfig, request?: any): void;
+  (message?: string, config?: RawAxiosRequestConfig, request?: any): void;
 }
 
 export interface CancelTokenStatic {
@@ -440,29 +444,29 @@ export interface AxiosInterceptorManager<V> {
 }
 
 export class Axios {
-  constructor(config?: AxiosRequestConfig);
+  constructor(config?: RawAxiosRequestConfig);
   defaults: AxiosDefaults;
   interceptors: {
     request: AxiosInterceptorManager<AxiosRequestConfig>;
     response: AxiosInterceptorManager<AxiosResponse>;
   };
-  getUri(config?: AxiosRequestConfig): string;
-  request<T = any, R = AxiosResponse<T>, D = any>(config: AxiosRequestConfig<D>): Promise<R>;
-  get<T = any, R = AxiosResponse<T>, D = any>(url: string, config?: AxiosRequestConfig<D>): Promise<R>;
-  delete<T = any, R = AxiosResponse<T>, D = any>(url: string, config?: AxiosRequestConfig<D>): Promise<R>;
-  head<T = any, R = AxiosResponse<T>, D = any>(url: string, config?: AxiosRequestConfig<D>): Promise<R>;
-  options<T = any, R = AxiosResponse<T>, D = any>(url: string, config?: AxiosRequestConfig<D>): Promise<R>;
-  post<T = any, R = AxiosResponse<T>, D = any>(url: string, data?: D, config?: AxiosRequestConfig<D>): Promise<R>;
-  put<T = any, R = AxiosResponse<T>, D = any>(url: string, data?: D, config?: AxiosRequestConfig<D>): Promise<R>;
-  patch<T = any, R = AxiosResponse<T>, D = any>(url: string, data?: D, config?: AxiosRequestConfig<D>): Promise<R>;
-  postForm<T = any, R = AxiosResponse<T>, D = any>(url: string, data?: D, config?: AxiosRequestConfig<D>): Promise<R>;
-  putForm<T = any, R = AxiosResponse<T>, D = any>(url: string, data?: D, config?: AxiosRequestConfig<D>): Promise<R>;
-  patchForm<T = any, R = AxiosResponse<T>, D = any>(url: string, data?: D, config?: AxiosRequestConfig<D>): Promise<R>;
+  getUri(config?: RawAxiosRequestConfig): string;
+  request<T = any, R = AxiosResponse<T>, D = any>(config: RawAxiosRequestConfig<D>): Promise<R>;
+  get<T = any, R = AxiosResponse<T>, D = any>(url: string, config?: RawAxiosRequestConfig<D>): Promise<R>;
+  delete<T = any, R = AxiosResponse<T>, D = any>(url: string, config?: RawAxiosRequestConfig<D>): Promise<R>;
+  head<T = any, R = AxiosResponse<T>, D = any>(url: string, config?: RawAxiosRequestConfig<D>): Promise<R>;
+  options<T = any, R = AxiosResponse<T>, D = any>(url: string, config?: RawAxiosRequestConfig<D>): Promise<R>;
+  post<T = any, R = AxiosResponse<T>, D = any>(url: string, data?: D, config?: RawAxiosRequestConfig<D>): Promise<R>;
+  put<T = any, R = AxiosResponse<T>, D = any>(url: string, data?: D, config?: RawAxiosRequestConfig<D>): Promise<R>;
+  patch<T = any, R = AxiosResponse<T>, D = any>(url: string, data?: D, config?: RawAxiosRequestConfig<D>): Promise<R>;
+  postForm<T = any, R = AxiosResponse<T>, D = any>(url: string, data?: D, config?: RawAxiosRequestConfig<D>): Promise<R>;
+  putForm<T = any, R = AxiosResponse<T>, D = any>(url: string, data?: D, config?: RawAxiosRequestConfig<D>): Promise<R>;
+  patchForm<T = any, R = AxiosResponse<T>, D = any>(url: string, data?: D, config?: RawAxiosRequestConfig<D>): Promise<R>;
 }
 
 export interface AxiosInstance extends Axios {
-  <T = any, R = AxiosResponse<T>, D = any>(config: AxiosRequestConfig<D>): Promise<R>;
-  <T = any, R = AxiosResponse<T>, D = any>(url: string, config?: AxiosRequestConfig<D>): Promise<R>;
+  <T = any, R = AxiosResponse<T>, D = any>(config: RawAxiosRequestConfig<D>): Promise<R>;
+  <T = any, R = AxiosResponse<T>, D = any>(url: string, config?: RawAxiosRequestConfig<D>): Promise<R>;
 
   defaults: Omit<AxiosDefaults, 'headers'> & {
     headers: HeadersDefaults & {
diff --git a/test/module/test.js b/test/module/test.js
index 3410ca2a88..c4e3d1ebf2 100644
--- a/test/module/test.js
+++ b/test/module/test.js
@@ -58,90 +58,93 @@ describe('module', function () {
     await remove(BACKUP_PATH);
   });
 
-  it('should have consistent ESM export', function () {
-    const namedExport = {};
-    const factoryExport = {};
-
-    Object.entries(axiosFactory).forEach(([key, value]) => {
-      if(!utils.hasOwnProp(Axios, key) && !(key in instance) && ignoreList.indexOf(key) === -1) {
-        factoryExport[key] = value;
-      }
-    });
+  describe('export', function () {
 
-    Object.entries(axios).forEach(([key, value]) => {
-      key!=='default' && ignoreList.indexOf(key) === -1 && (namedExport[key] = value);
-    });
+    it('should have consistent ESM export', function () {
+      const namedExport = {};
+      const factoryExport = {};
 
-    assert.deepStrictEqual(namedExport, factoryExport);
-  });
+      Object.entries(axiosFactory).forEach(([key, value]) => {
+        if (!utils.hasOwnProp(Axios, key) && !(key in instance) && ignoreList.indexOf(key) === -1) {
+          factoryExport[key] = value;
+        }
+      });
 
-  describe('CommonJS', ()=> {
-    const pkgPath = path.join(__dirname, './cjs');
+      Object.entries(axios).forEach(([key, value]) => {
+        key !== 'default' && ignoreList.indexOf(key) === -1 && (namedExport[key] = value);
+      });
 
-    after(async ()=> {
-      await remove(path.join(pkgPath, './node_modules'));
+      assert.deepStrictEqual(namedExport, factoryExport);
     });
 
-    it('should be able to be loaded with require', async function () {
-      this.timeout(30000);
+    describe('CommonJS', () => {
+      const pkgPath = path.join(__dirname, './cjs');
 
-      await exec(`npm test --prefix ${pkgPath}`);
-    });
-  });
+      after(async () => {
+        await remove(path.join(pkgPath, './node_modules'));
+      });
 
-  describe('ESM', ()=> {
-    const pkgPath = path.join(__dirname, './esm');
+      it('should be able to be loaded with require', async function () {
+        this.timeout(30000);
 
-    after(async ()=> {
-      await remove(path.join(pkgPath, './node_modules'));
+        await exec(`npm test --prefix ${pkgPath}`);
+      });
     });
 
-    it('should be able to be loaded with import', async function () {
-      this.timeout(30000);
+    describe('ESM', () => {
+      const pkgPath = path.join(__dirname, './esm');
 
-      await exec(`npm test --prefix ${pkgPath}`);
-    });
-  });
+      after(async () => {
+        await remove(path.join(pkgPath, './node_modules'));
+      });
 
-  describe('TS', ()=> {
-    const pkgPath = path.join(__dirname, './ts');
+      it('should be able to be loaded with import', async function () {
+        this.timeout(30000);
 
-    after(async ()=> {
-      await remove(path.join(pkgPath, './node_modules'));
+        await exec(`npm test --prefix ${pkgPath}`);
+      });
     });
 
-    it('should be able to be loaded with import', async function () {
-      this.timeout(30000);
+    describe('TS', () => {
+      const pkgPath = path.join(__dirname, './ts');
 
-      await exec(`npm test --prefix ${pkgPath}`, {});
-    });
-  });
+      after(async () => {
+        await remove(path.join(pkgPath, './node_modules'));
+      });
 
-  describe('TS require(\'axios\')', ()=> {
-    const pkgPath = path.join(__dirname, './ts-require');
+      it('should be able to be loaded with import', async function () {
+        this.timeout(30000);
 
-    after(async ()=> {
-      await remove(path.join(pkgPath, './node_modules'));
+        await exec(`npm test --prefix ${pkgPath}`, {});
+      });
     });
 
-    it('should be able to be loaded with require', async function () {
-      this.timeout(30000);
+    describe('TS require(\'axios\')', () => {
+      const pkgPath = path.join(__dirname, './ts-require');
 
-      await exec(`npm test --prefix ${pkgPath}`, {});
-    });
-  });
+      after(async () => {
+        await remove(path.join(pkgPath, './node_modules'));
+      });
 
-  describe('TS require(\'axios\').default', ()=> {
-    const pkgPath = path.join(__dirname, './ts-require-default');
+      it('should be able to be loaded with require', async function () {
+        this.timeout(30000);
 
-    after(async ()=> {
-      await remove(path.join(pkgPath, './node_modules'));
+        await exec(`npm test --prefix ${pkgPath}`, {});
+      });
     });
 
-    it('should be able to be loaded with require', async function () {
-      this.timeout(30000);
+    describe('TS require(\'axios\').default', () => {
+      const pkgPath = path.join(__dirname, './ts-require-default');
+
+      after(async () => {
+        await remove(path.join(pkgPath, './node_modules'));
+      });
+
+      it('should be able to be loaded with require', async function () {
+        this.timeout(30000);
 
-      await exec(`npm test --prefix ${pkgPath}`, {});
+        await exec(`npm test --prefix ${pkgPath}`, {});
+      });
     });
   });
 
diff --git a/test/module/typings/cjs/index.ts b/test/module/typings/cjs/index.ts
index 95a3524e07..36b55d6a00 100644
--- a/test/module/typings/cjs/index.ts
+++ b/test/module/typings/cjs/index.ts
@@ -1,6 +1,6 @@
 import axios = require('axios');
 
-const config: axios.AxiosRequestConfig = {
+const config: axios.RawAxiosRequestConfig = {
   url: '/user',
   method: 'get',
   baseURL: 'https://api.example.com/',
@@ -38,11 +38,11 @@ const config: axios.AxiosRequestConfig = {
   cancelToken: new axios.CancelToken((cancel: axios.Canceler) => {})
 };
 
-const nullValidateStatusConfig: axios.AxiosRequestConfig = {
+const nullValidateStatusConfig: axios.RawAxiosRequestConfig = {
   validateStatus: null
 };
 
-const undefinedValidateStatusConfig: axios.AxiosRequestConfig = {
+const undefinedValidateStatusConfig: axios.RawAxiosRequestConfig = {
   validateStatus: undefined
 };
 
diff --git a/test/module/typings/esm/index.ts b/test/module/typings/esm/index.ts
index ba2e439509..224ba213e8 100644
--- a/test/module/typings/esm/index.ts
+++ b/test/module/typings/esm/index.ts
@@ -1,4 +1,5 @@
 import axios, {
+  RawAxiosRequestConfig,
   AxiosRequestConfig,
   AxiosHeaders,
   AxiosRequestHeaders,
@@ -21,7 +22,7 @@ import axios, {
   spread
 } from 'axios';
 
-const config: AxiosRequestConfig = {
+const config: RawAxiosRequestConfig = {
   url: '/user',
   method: 'get',
   baseURL: 'https://api.example.com/',
@@ -59,11 +60,11 @@ const config: AxiosRequestConfig = {
   cancelToken: new axios.CancelToken((cancel: Canceler) => {})
 };
 
-const nullValidateStatusConfig: AxiosRequestConfig = {
+const nullValidateStatusConfig: RawAxiosRequestConfig = {
   validateStatus: null
 };
 
-const undefinedValidateStatusConfig: AxiosRequestConfig = {
+const undefinedValidateStatusConfig: RawAxiosRequestConfig = {
   validateStatus: undefined
 };
 
@@ -86,48 +87,48 @@ const handleError = (error: AxiosError) => {
 };
 
 axios(config)
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 axios.get('/user?id=12345')
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 axios.get('/user', { params: { id: 12345 } })
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 axios.head('/user')
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 axios.options('/user')
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 axios.delete('/user')
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 axios.post('/user', { foo: 'bar' })
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 axios.post('/user', { foo: 'bar' }, { headers: { 'X-FOO': 'bar' } })
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 axios.put('/user', { foo: 'bar' })
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 axios.patch('/user', { foo: 'bar' })
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 // Typed methods
 interface UserCreationDef {
-    name: string;
+  name: string;
 }
 
 interface User {
@@ -138,49 +139,49 @@ interface User {
 // with default AxiosResponse<T> result
 
 const handleUserResponse = (response: AxiosResponse<User>) => {
-	console.log(response.data.id);
-	console.log(response.data.name);
-	console.log(response.status);
-	console.log(response.statusText);
-	console.log(response.headers);
-	console.log(response.config);
+  console.log(response.data.id);
+  console.log(response.data.name);
+  console.log(response.status);
+  console.log(response.statusText);
+  console.log(response.headers);
+  console.log(response.config);
 };
 
 axios.get<User>('/user?id=12345')
-	.then(handleUserResponse)
-	.catch(handleError);
+    .then(handleUserResponse)
+    .catch(handleError);
 
 axios.get<User>('/user', { params: { id: 12345 } })
-	.then(handleUserResponse)
-	.catch(handleError);
+    .then(handleUserResponse)
+    .catch(handleError);
 
 axios.head<User>('/user')
-	.then(handleUserResponse)
+    .then(handleUserResponse)
     .catch(handleError);
 
 axios.options<User>('/user')
-	.then(handleUserResponse)
-	.catch(handleError);
+    .then(handleUserResponse)
+    .catch(handleError);
 
 axios.delete<User>('/user')
-	.then(handleUserResponse)
-	.catch(handleError);
+    .then(handleUserResponse)
+    .catch(handleError);
 
 axios.post<User>('/user', { name: 'foo', id: 1 })
-	.then(handleUserResponse)
-	.catch(handleError);
+    .then(handleUserResponse)
+    .catch(handleError);
 
 axios.post<User>('/user', { name: 'foo', id: 1 }, { headers: { 'X-FOO': 'bar' } })
-	.then(handleUserResponse)
-	.catch(handleError);
+    .then(handleUserResponse)
+    .catch(handleError);
 
 axios.put<User>('/user', { name: 'foo', id: 1 })
-	.then(handleUserResponse)
-	.catch(handleError);
+    .then(handleUserResponse)
+    .catch(handleError);
 
 axios.patch<User>('/user', { name: 'foo', id: 1 })
-	.then(handleUserResponse)
-  .catch(handleError);
+    .then(handleUserResponse)
+    .catch(handleError);
 
 // (Typed methods) with custom response type
 
@@ -189,47 +190,47 @@ const handleStringResponse = (response: string) => {
 };
 
 axios.get<User, string>('/user?id=12345')
-  .then(handleStringResponse)
-  .catch(handleError);
+    .then(handleStringResponse)
+    .catch(handleError);
 
 axios.get<User, string>('/user', { params: { id: 12345 } })
-  .then(handleStringResponse)
-  .catch(handleError);
+    .then(handleStringResponse)
+    .catch(handleError);
 
 axios.head<User, string>('/user')
-  .then(handleStringResponse)
-  .catch(handleError);
+    .then(handleStringResponse)
+    .catch(handleError);
 
 axios.options<User, string>('/user')
-  .then(handleStringResponse)
-  .catch(handleError);
+    .then(handleStringResponse)
+    .catch(handleError);
 
 axios.delete<User, string>('/user')
-  .then(handleStringResponse)
-  .catch(handleError);
+    .then(handleStringResponse)
+    .catch(handleError);
 
 axios.post<Partial<UserCreationDef>, string>('/user', { name: 'foo' })
-  .then(handleStringResponse)
-  .catch(handleError);
+    .then(handleStringResponse)
+    .catch(handleError);
 
 axios.post<Partial<UserCreationDef>, string>('/user', { name: 'foo' }, { headers: { 'X-FOO': 'bar' } })
-  .then(handleStringResponse)
-  .catch(handleError);
+    .then(handleStringResponse)
+    .catch(handleError);
 
 axios.put<Partial<UserCreationDef>, string>('/user', { name: 'foo' })
-  .then(handleStringResponse)
-  .catch(handleError);
+    .then(handleStringResponse)
+    .catch(handleError);
 
 axios.patch<Partial<UserCreationDef>, string>('/user', { name: 'foo' })
-  .then(handleStringResponse)
-  .catch(handleError);
+    .then(handleStringResponse)
+    .catch(handleError);
 
 axios.request<User, string>({
   method: 'get',
   url: '/user?id=12345'
 })
-  .then(handleStringResponse)
-  .catch(handleError);
+    .then(handleStringResponse)
+    .catch(handleError);
 
 // Instances
 
@@ -237,32 +238,32 @@ const instance1: AxiosInstance = axios.create();
 const instance2: AxiosInstance = axios.create(config);
 
 instance1(config)
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 instance1.request(config)
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 instance1.get('/user?id=12345')
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 instance1.options('/user')
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 instance1.get('/user', { params: { id: 12345 } })
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 instance1.post('/user', { foo: 'bar' })
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 instance1.post('/user', { foo: 'bar' }, { headers: { 'X-FOO': 'bar' } })
-  .then(handleResponse)
-  .catch(handleError);
+    .then(handleResponse)
+    .catch(handleError);
 
 // Defaults
 
@@ -297,47 +298,54 @@ axios.create({
 // Interceptors
 
 const requestInterceptorId: number = axios.interceptors.request.use(
-  async (config: AxiosRequestConfig) => {
-    await axios.get('/foo', {
-      headers: config.headers
-    });
-    return config;
-  },
-  (error: any) => Promise.reject(error),
-  {synchronous: false}
+    async (config) => {
+      await axios.get('/foo', {
+        headers: config.headers
+      });
+      return config;
+    },
+    (error: any) => Promise.reject(error),
+    {synchronous: false}
 );
 
 axios.interceptors.request.eject(requestInterceptorId);
 
 axios.interceptors.request.use(
-  (config: AxiosRequestConfig) => Promise.resolve(config),
-  (error: any) => Promise.reject(error)
+    (config) => Promise.resolve(config),
+    (error: any) => Promise.reject(error)
 );
 
-axios.interceptors.request.use((config: AxiosRequestConfig) => config);
-axios.interceptors.request.use((config: AxiosRequestConfig) => Promise.resolve(config));
+axios.interceptors.request.use((config) => config);
+axios.interceptors.request.use((config) => Promise.resolve(config));
 
 const responseInterceptorId: number = axios.interceptors.response.use(
-  (response: AxiosResponse) => response,
-  (error: any) => Promise.reject(error)
+    (response: AxiosResponse) => response,
+    (error: any) => Promise.reject(error)
 );
 
 axios.interceptors.response.eject(responseInterceptorId);
 
 axios.interceptors.response.use(
-  (response: AxiosResponse) => Promise.resolve(response),
-  (error: any) => Promise.reject(error)
+    (response: AxiosResponse) => Promise.resolve(response),
+    (error: any) => Promise.reject(error)
 );
 
+axios.interceptors.request.use(req => {
+  // https://github.com/axios/axios/issues/5415
+  req.headers.set('foo', 'bar');
+  req.headers['Content-Type'] = 123;
+  return req;
+});
+
 const voidRequestInterceptorId = axios.interceptors.request.use(
-  // @ts-expect-error -- Must return an AxiosRequestConfig (or throw)
-  (_response) => {},
-  (error: any) => Promise.reject(error)
+    // @ts-expect-error -- Must return an AxiosRequestConfig (or throw)
+    (_response) => {},
+    (error: any) => Promise.reject(error)
 );
 const voidResponseInterceptorId = axios.interceptors.response.use(
-  // @ts-expect-error -- Must return an AxiosResponse (or throw)
-  (_response) => {},
-  (error: any) => Promise.reject(error)
+    // @ts-expect-error -- Must return an AxiosResponse (or throw)
+    (_response) => {},
+    (error: any) => Promise.reject(error)
 );
 axios.interceptors.request.eject(voidRequestInterceptorId);
 axios.interceptors.response.eject(voidResponseInterceptorId);
@@ -350,7 +358,7 @@ axios.interceptors.response.clear();
 
 // Adapters
 
-const adapter: AxiosAdapter = (config: AxiosRequestConfig) => {
+const adapter: AxiosAdapter = (config) => {
   const response: AxiosResponse = {
     data: { foo: 'bar' },
     status: 200,
@@ -397,28 +405,28 @@ const fn2: (arr: number[]) => string = axios.spread(fn1);
 // Promises
 
 axios.get('/user')
-  .then((response: AxiosResponse) => 'foo')
-  .then((value: string) => {});
+    .then((response: AxiosResponse) => 'foo')
+    .then((value: string) => {});
 
 axios.get('/user')
-  .then((response: AxiosResponse) => Promise.resolve('foo'))
-  .then((value: string) => {});
+    .then((response: AxiosResponse) => Promise.resolve('foo'))
+    .then((value: string) => {});
 
 axios.get('/user')
-  .then((response: AxiosResponse) => 'foo', (error: any) => 'bar')
-  .then((value: string) => {});
+    .then((response: AxiosResponse) => 'foo', (error: any) => 'bar')
+    .then((value: string) => {});
 
 axios.get('/user')
-  .then((response: AxiosResponse) => 'foo', (error: any) => 123)
-  .then((value: string | number) => {});
+    .then((response: AxiosResponse) => 'foo', (error: any) => 123)
+    .then((value: string | number) => {});
 
 axios.get('/user')
-  .catch((error: any) => 'foo')
-  .then((value: any) => {});
+    .catch((error: any) => 'foo')
+    .then((value: any) => {});
 
 axios.get('/user')
-  .catch((error: any) => Promise.resolve('foo'))
-  .then((value: any) => {});
+    .catch((error: any) => Promise.resolve('foo'))
+    .then((value: any) => {});
 
 // Cancellation
 
@@ -444,17 +452,17 @@ source.cancel('Operation has been canceled.');
 // AxiosError
 
 axios.get('/user')
-  .catch((error: AxiosError) => {
-    if (axios.isAxiosError(error)) {
-      const axiosError: AxiosError = error;
-    }
+    .catch((error: AxiosError) => {
+      if (axios.isAxiosError(error)) {
+        const axiosError: AxiosError = error;
+      }
 
-    // named export
+      // named export
 
-    if (isAxiosError(error)) {
-      const axiosError: AxiosError = error;
-    }
-  });
+      if (isAxiosError(error)) {
+        const axiosError: AxiosError = error;
+      }
+    });
 
 // FormData
 
@@ -507,17 +515,17 @@ axios.get('/user', {
 
 // issue #5034
 
-function getRequestConfig1(options: AxiosRequestConfig): AxiosRequestConfig {
+function getRequestConfig1(options: RawAxiosRequestConfig): RawAxiosRequestConfig {
   return {
     ...options,
     headers: {
-    ...(options.headers as RawAxiosRequestHeaders),
+      ...(options.headers as RawAxiosRequestHeaders),
       Authorization: `Bearer ...`,
     },
   };
 }
 
-function getRequestConfig2(options: AxiosRequestConfig): AxiosRequestConfig {
+function getRequestConfig2(options: RawAxiosRequestConfig): RawAxiosRequestConfig {
   return {
     ...options,
     headers: {