fix: added a option to choose between legacy and the new request/response interceptor ordering

* test: add request interceptor tests for legacy and ordered execution

* feat: add legacy interceptor request/response ordering option

---------

Co-authored-by: Jay <jasonsaayman@gmail.com>

lib/core/Axios.js

@@ -8,6 +8,7 @@ import mergeConfig from './mergeConfig.js';
 import buildFullPath from './buildFullPath.js';
 import validator from '../helpers/validator.js';
 import AxiosHeaders from './AxiosHeaders.js';
+import transitionalDefaults from '../defaults/transitional.js';
 
 const validators = validator.validators;
 
@@ -80,7 +81,8 @@ class Axios {
       validator.assertOptions(transitional, {
         silentJSONParsing: validators.transitional(validators.boolean),
         forcedJSONParsing: validators.transitional(validators.boolean),
-        clarifyTimeoutError: validators.transitional(validators.boolean)
+        clarifyTimeoutError: validators.transitional(validators.boolean),
+        legacyInterceptorReqResOrdering: validators.transitional(validators.boolean)
       }, false);
     }
 
@@ -139,7 +141,14 @@ class Axios {
 
       synchronousRequestInterceptors = synchronousRequestInterceptors && interceptor.synchronous;
 
-      requestInterceptorChain.unshift(interceptor.fulfilled, interceptor.rejected);
+      const transitional = config.transitional || transitionalDefaults;
+      const legacyInterceptorReqResOrdering = transitional && transitional.legacyInterceptorReqResOrdering;
+
+      if (legacyInterceptorReqResOrdering) {
+        requestInterceptorChain.unshift(interceptor.fulfilled, interceptor.rejected);
+      } else {
+        requestInterceptorChain.push(interceptor.fulfilled, interceptor.rejected);
+      }
     });
 
     const responseInterceptorChain = [];

lib/defaults/transitional.js

@@ -3,5 +3,6 @@
 export default {
   silentJSONParsing: true,
   forcedJSONParsing: true,
-  clarifyTimeoutError: false
+  clarifyTimeoutError: false,
+  legacyInterceptorReqResOrdering: true
 };