fix problem with package.json exports declaration for CommonJS

dist/node/axios.cjs

@@ -1049,12 +1049,20 @@ function buildURL(url, params, options) {
 
   const _encode = options && options.encode || encode;
 
-  const serializerParams = utils.isURLSearchParams(params) ?
-    params.toString() :
-    new AxiosURLSearchParams(params, options).toString(_encode);
+  const serializeFn = options && options.serialize;
 
-  if (serializerParams) {
-    url += (url.indexOf('?') === -1 ? '?' : '&') + serializerParams;
+  let serializedParams;
+
+  if (serializeFn) {
+    serializedParams = serializeFn(params, options);
+  } else {
+    serializedParams = utils.isURLSearchParams(params) ?
+      params.toString() :
+      new AxiosURLSearchParams(params, options).toString(_encode);
+  }
+
+  if (serializedParams) {
+    url += (url.indexOf('?') === -1 ? '?' : '&') + serializedParams;
   }
 
   return url;
@@ -1451,7 +1459,7 @@ function normalizeValue(value) {
     return value;
   }
 
-  return String(value);
+  return utils.isArray(value) ? value.map(normalizeValue) : String(value);
 }
 
 function parseTokens(str) {
@@ -1538,13 +1546,7 @@ Object.assign(AxiosHeaders.prototype, {
         return;
       }
 
-      if (utils.isArray(_value)) {
-        _value = _value.map(normalizeValue);
-      } else {
-        _value = normalizeValue(_value);
-      }
-
-      self[key || _header] = _value;
+      self[key || _header] = normalizeValue(_value);
     }
 
     if (utils.isPlainObject(header)) {
@@ -1658,13 +1660,13 @@ Object.assign(AxiosHeaders.prototype, {
     return this;
   },
 
-  toJSON: function() {
+  toJSON: function(asStrings) {
     const obj = Object.create(null);
 
     utils.forEach(Object.assign({}, this[$defaults] || null, this),
       (value, header) => {
         if (value == null || value === false) return;
-        obj[header] = utils.isArray(value) ? value.join(', ') : value;
+        obj[header] = asStrings && utils.isArray(value) ? value.join(', ') : value;
       });
 
     return obj;
@@ -2003,7 +2005,7 @@ function dispatchBeforeRedirect(options) {
  * If the proxy or config afterRedirects functions are defined, call them with the options
  *
  * @param {http.ClientRequestArgs} options
- * @param {AxiosProxyConfig} configProxy
+ * @param {AxiosProxyConfig} configProxy configuration from Axios options object
  * @param {string} location
  *
  * @returns {http.ClientRequestArgs}
@@ -2034,13 +2036,14 @@ function setProxy(options, configProxy, location) {
     }
 
     options.headers.host = options.hostname + (options.port ? ':' + options.port : '');
-    options.hostname = proxy.hostname;
+    const proxyHost = proxy.hostname || proxy.host;
+    options.hostname = proxyHost;
     // Replace 'host' since options is not a URL object
-    options.host = proxy.hostname;
+    options.host = proxyHost;
     options.port = proxy.port;
     options.path = location;
     if (proxy.protocol) {
-      options.protocol = proxy.protocol;
+      options.protocol = proxy.protocol.includes(':') ? proxy.protocol : `${proxy.protocol}:`;
     }
   }
 
@@ -3401,7 +3404,7 @@ class Axios {
 
     config = mergeConfig(this.defaults, config);
 
-    const transitional = config.transitional;
+    const {transitional, paramsSerializer} = config;
 
     if (transitional !== undefined) {
       validator.assertOptions(transitional, {
@@ -3411,6 +3414,13 @@ class Axios {
       }, false);
     }
 
+    if (paramsSerializer !== undefined) {
+      validator.assertOptions(paramsSerializer, {
+        encode: validators.function,
+        serialize: validators.function
+      }, true);
+    }
+
     // Set config.method
     config.method = (config.method || this.defaults.method || 'get').toLowerCase();
 

index.js

@@ -28,5 +28,6 @@ export {
   Cancel,
   isAxiosError,
   spread,
-  toFormData
+  toFormData,
+  axios
 }