@@ -1,5 +1,24 @@
 # Changelog
 
+## [1.5.1](https://github.com/axios/axios/compare/v1.5.0...v1.5.1) (2023-09-26)
+
+
+### Bug Fixes
+
+* **adapters:** improved adapters loading logic to have clear error messages; ([#5919](https://github.com/axios/axios/issues/5919)) ([e410779](https://github.com/axios/axios/commit/e4107797a7a1376f6209fbecfbbce73d3faa7859))
+* **formdata:** fixed automatic addition of the `Content-Type` header for FormData in non-browser environments; ([#5917](https://github.com/axios/axios/issues/5917)) ([bc9af51](https://github.com/axios/axios/commit/bc9af51b1886d1b3529617702f2a21a6c0ed5d92))
+* **headers:** allow `content-encoding` header to handle case-insensitive values ([#5890](https://github.com/axios/axios/issues/5890)) ([#5892](https://github.com/axios/axios/issues/5892)) ([4c89f25](https://github.com/axios/axios/commit/4c89f25196525e90a6e75eda9cb31ae0a2e18acd))
+* **types:** removed duplicated code ([9e62056](https://github.com/axios/axios/commit/9e6205630e1c9cf863adf141c0edb9e6d8d4b149))
+
+### Contributors to this release
+
+- <img src="https://avatars.githubusercontent.com/u/12586868?v&#x3D;4&amp;s&#x3D;18" alt="avatar" width="18"/> [Dmitriy Mozgovoy](https://github.com/DigitalBrainJS "+89/-18 (#5919 #5917 )")
+- <img src="https://avatars.githubusercontent.com/u/110460234?v&#x3D;4&amp;s&#x3D;18" alt="avatar" width="18"/> [David Dallas](https://github.com/DavidJDallas "+11/-5 ()")
+- <img src="https://avatars.githubusercontent.com/u/71556073?v&#x3D;4&amp;s&#x3D;18" alt="avatar" width="18"/> [Sean Sattler](https://github.com/fb-sean "+2/-8 ()")
+- <img src="https://avatars.githubusercontent.com/u/4294069?v&#x3D;4&amp;s&#x3D;18" alt="avatar" width="18"/> [Mustafa Ateş Uzun](https://github.com/0o001 "+4/-4 ()")
+- <img src="https://avatars.githubusercontent.com/u/132928043?v&#x3D;4&amp;s&#x3D;18" alt="avatar" width="18"/> [Przemyslaw Motacki](https://github.com/sfc-gh-pmotacki "+2/-1 (#5892 )")
+- <img src="https://avatars.githubusercontent.com/u/5492927?v&#x3D;4&amp;s&#x3D;18" alt="avatar" width="18"/> [Michael Di Prisco](https://github.com/Cadienvan "+1/-1 ()")
+
 # [1.5.0](https://github.com/axios/axios/compare/v1.4.0...v1.5.0) (2023-08-26)
 
 
 
@@ -1,7 +1,7 @@
 {
   "name": "axios",
   "main": "./dist/axios.js",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "homepage": "https://axios-http.com",
   "authors": [
     "Matt Zabriskie"
 
@@ -1,4 +1,4 @@
-// Axios v1.5.0 Copyright (c) 2023 Matt Zabriskie and contributors
+// Axios v1.5.1 Copyright (c) 2023 Matt Zabriskie and contributors
 'use strict';
 
 function bind(fn, thisArg) {
@@ -1418,7 +1418,7 @@ const defaults = {
 
   transitional: transitionalDefaults,
 
-  adapter: platform.isNode ? 'http' : 'xhr',
+  adapter: ['xhr', 'http'],
 
   transformRequest: [function transformRequest(data, headers) {
     const contentType = headers.getContentType() || '';
@@ -2215,11 +2215,16 @@ var xhrAdapter = isXHRAdapterSupported && function (config) {
       }
     }
 
+    let contentType;
+
     if (utils.isFormData(requestData)) {
       if (platform.isStandardBrowserEnv || platform.isStandardBrowserWebWorkerEnv) {
         requestHeaders.setContentType(false); // Let the browser set it
-      } else {
-        requestHeaders.setContentType('multipart/form-data;', false); // mobile/desktop app frameworks
+      } else if(!requestHeaders.getContentType(/^\s*multipart\/form-data/)){
+        requestHeaders.setContentType('multipart/form-data'); // mobile/desktop app frameworks
+      } else if(utils.isString(contentType = requestHeaders.getContentType())){
+        // fix semicolon duplication issue for ReactNative FormData implementation
+        requestHeaders.setContentType(contentType.replace(/^\s*(multipart\/form-data);+/, '$1'));
       }
     }
 
@@ -2412,7 +2417,7 @@ const knownAdapters = {
 };
 
 utils.forEach(knownAdapters, (fn, value) => {
-  if(fn) {
+  if (fn) {
     try {
       Object.defineProperty(fn, 'name', {value});
     } catch (e) {
@@ -2422,6 +2427,10 @@ utils.forEach(knownAdapters, (fn, value) => {
   }
 });
 
+const renderReason = (reason) => `- ${reason}`;
+
+const isResolvedHandle = (adapter) => utils.isFunction(adapter) || adapter === null || adapter === false;
+
 var adapters = {
   getAdapter: (adapters) => {
     adapters = utils.isArray(adapters) ? adapters : [adapters];
@@ -2430,30 +2439,44 @@ var adapters = {
     let nameOrAdapter;
     let adapter;
 
+    const rejectedReasons = {};
+
     for (let i = 0; i < length; i++) {
       nameOrAdapter = adapters[i];
-      if((adapter = utils.isString(nameOrAdapter) ? knownAdapters[nameOrAdapter.toLowerCase()] : nameOrAdapter)) {
+      let id;
+
+      adapter = nameOrAdapter;
+
+      if (!isResolvedHandle(nameOrAdapter)) {
+        adapter = knownAdapters[(id = String(nameOrAdapter)).toLowerCase()];
+
+        if (adapter === undefined) {
+          throw new AxiosError(`Unknown adapter '${id}'`);
+        }
+      }
+
+      if (adapter) {
         break;
       }
+
+      rejectedReasons[id || '#' + i] = adapter;
     }
 
     if (!adapter) {
-      if (adapter === false) {
-        throw new AxiosError(
-          `Adapter ${nameOrAdapter} is not supported by the environment`,
-          'ERR_NOT_SUPPORT'
+
+      const reasons = Object.entries(rejectedReasons)
+        .map(([id, state]) => `adapter ${id} ` +
+          (state === false ? 'is not supported by the environment' : 'is not available in the build')
         );
-      }
 
-      throw new Error(
-        utils.hasOwnProp(knownAdapters, nameOrAdapter) ?
-          `Adapter '${nameOrAdapter}' is not available in the build` :
-          `Unknown adapter '${nameOrAdapter}'`
-      );
-    }
+      let s = length ?
+        (reasons.length > 1 ? 'since :\n' + reasons.map(renderReason).join('\n') : ' ' + renderReason(reasons[0])) :
+        'as no adapter specified';
 
-    if (!utils.isFunction(adapter)) {
-      throw new TypeError('adapter is not a function');
+      throw new AxiosError(
+        `There is no suitable adapter to dispatch the request ` + s,
+        'ERR_NOT_SUPPORT'
+      );
     }
 
     return adapter;
@@ -2635,7 +2658,7 @@ function mergeConfig(config1, config2) {
   return config;
 }
 
-const VERSION = "1.5.0";
+const VERSION = "1.5.1";
 
 const validators$1 = {};
Original file line number	Diff line number	Diff line change
`@@ -1,7 +1,7 @@`
`1`	`1`	`{`
`2`	`2`	`"name": "axios",`
`3`	`3`	`"main": "./dist/axios.js",`
`4`		`- "version": "1.5.0",`
	`4`	`+ "version": "1.5.1",`
`5`	`5`	`"homepage": "https://axios-http.com",`
`6`	`6`	`"authors": [`
`7`	`7`	`"Matt Zabriskie"`