diff --git a/modules/swagger-codegen/src/main/resources/Javascript-es6/ApiClient.mustache b/modules/swagger-codegen/src/main/resources/Javascript-es6/ApiClient.mustache
index 1c14c0e753aa..d5387dc2225d 100644
--- a/modules/swagger-codegen/src/main/resources/Javascript-es6/ApiClient.mustache
+++ b/modules/swagger-codegen/src/main/resources/Javascript-es6/ApiClient.mustache
@@ -160,9 +160,15 @@ export default class ApiClient {
     */
     {{/emitJSDoc}}
     isFileParam(param) {
-        // fs.ReadStream in Node.js (but not in runtime like browserify)
-        if (typeof window === 'undefined' && typeof require === 'function' && require('fs') && param instanceof require('fs').ReadStream) {
-            return true;
+        // fs.ReadStream in Node.js and Electron (but not in runtime like browserify)
+        if (typeof require === 'function') {
+            let fs
+            try {
+                fs = require('fs')
+            } catch (err) {}
+            if (fs && fs.ReadStream && param instanceof fs.ReadStream) {
+                return true;
+            }
         }
 
         // Buffer in Node.js
diff --git a/modules/swagger-codegen/src/main/resources/Javascript/ApiClient.mustache b/modules/swagger-codegen/src/main/resources/Javascript/ApiClient.mustache
index 2310731ef450..cea31ae46af4 100644
--- a/modules/swagger-codegen/src/main/resources/Javascript/ApiClient.mustache
+++ b/modules/swagger-codegen/src/main/resources/Javascript/ApiClient.mustache
@@ -168,12 +168,15 @@
    * @returns {Boolean} <code>true</code> if <code>param</code> represents a file.
    */
 {{/emitJSDoc}}  exports.prototype.isFileParam = function(param) {
-    // fs.ReadStream in Node.js (but not in runtime like browserify)
-    if (typeof window === 'undefined' &&
-        typeof require === 'function' &&
-        require('fs') &&
-        param instanceof require('fs').ReadStream) {
-      return true;
+    // fs.ReadStream in Node.js and Electron (but not in runtime like browserify)
+    if (typeof require === 'function') {
+      var fs
+      try {
+        fs = require('fs')
+      } catch (err) {}
+      if (fs && fs.ReadStream && param instanceof fs.ReadStream) {
+        return true;
+      }
     }
     // Buffer in Node.js
     if (typeof Buffer === 'function' && param instanceof Buffer) {
diff --git a/samples/client/petstore/javascript-es6/src/ApiClient.js b/samples/client/petstore/javascript-es6/src/ApiClient.js
index ce06f6ac52ab..da82de5383e8 100644
--- a/samples/client/petstore/javascript-es6/src/ApiClient.js
+++ b/samples/client/petstore/javascript-es6/src/ApiClient.js
@@ -174,12 +174,15 @@
    * @returns {Boolean} <code>true</code> if <code>param</code> represents a file.
    */
   exports.prototype.isFileParam = function(param) {
-    // fs.ReadStream in Node.js (but not in runtime like browserify)
-    if (typeof window === 'undefined' &&
-        typeof require === 'function' &&
-        require('fs') &&
-        param instanceof require('fs').ReadStream) {
-      return true;
+    // fs.ReadStream in Node.js and Electron (but not in runtime like browserify)
+    if (typeof require === 'function') {
+      var fs
+      try {
+        fs = require('fs')
+      } catch (err) {}
+      if (fs && fs.ReadStream && param instanceof fs.ReadStream) {
+        return true;
+      }
     }
     // Buffer in Node.js
     if (typeof Buffer === 'function' && param instanceof Buffer) {
diff --git a/samples/client/petstore/javascript-promise-es6/src/ApiClient.js b/samples/client/petstore/javascript-promise-es6/src/ApiClient.js
index 49e860f339d4..fe0a118df502 100644
--- a/samples/client/petstore/javascript-promise-es6/src/ApiClient.js
+++ b/samples/client/petstore/javascript-promise-es6/src/ApiClient.js
@@ -174,12 +174,15 @@
    * @returns {Boolean} <code>true</code> if <code>param</code> represents a file.
    */
   exports.prototype.isFileParam = function(param) {
-    // fs.ReadStream in Node.js (but not in runtime like browserify)
-    if (typeof window === 'undefined' &&
-        typeof require === 'function' &&
-        require('fs') &&
-        param instanceof require('fs').ReadStream) {
-      return true;
+    // fs.ReadStream in Node.js and Electron (but not in runtime like browserify)
+    if (typeof require === 'function') {
+      var fs
+      try {
+        fs = require('fs')
+      } catch (err) {}
+      if (fs && fs.ReadStream && param instanceof fs.ReadStream) {
+        return true;
+      }
     }
     // Buffer in Node.js
     if (typeof Buffer === 'function' && param instanceof Buffer) {
diff --git a/samples/client/petstore/javascript-promise/src/ApiClient.js b/samples/client/petstore/javascript-promise/src/ApiClient.js
index 49e860f339d4..fe0a118df502 100644
--- a/samples/client/petstore/javascript-promise/src/ApiClient.js
+++ b/samples/client/petstore/javascript-promise/src/ApiClient.js
@@ -174,12 +174,15 @@
    * @returns {Boolean} <code>true</code> if <code>param</code> represents a file.
    */
   exports.prototype.isFileParam = function(param) {
-    // fs.ReadStream in Node.js (but not in runtime like browserify)
-    if (typeof window === 'undefined' &&
-        typeof require === 'function' &&
-        require('fs') &&
-        param instanceof require('fs').ReadStream) {
-      return true;
+    // fs.ReadStream in Node.js and Electron (but not in runtime like browserify)
+    if (typeof require === 'function') {
+      var fs
+      try {
+        fs = require('fs')
+      } catch (err) {}
+      if (fs && fs.ReadStream && param instanceof fs.ReadStream) {
+        return true;
+      }
     }
     // Buffer in Node.js
     if (typeof Buffer === 'function' && param instanceof Buffer) {
diff --git a/samples/client/petstore/javascript/src/ApiClient.js b/samples/client/petstore/javascript/src/ApiClient.js
index ce06f6ac52ab..da82de5383e8 100644
--- a/samples/client/petstore/javascript/src/ApiClient.js
+++ b/samples/client/petstore/javascript/src/ApiClient.js
@@ -174,12 +174,15 @@
    * @returns {Boolean} <code>true</code> if <code>param</code> represents a file.
    */
   exports.prototype.isFileParam = function(param) {
-    // fs.ReadStream in Node.js (but not in runtime like browserify)
-    if (typeof window === 'undefined' &&
-        typeof require === 'function' &&
-        require('fs') &&
-        param instanceof require('fs').ReadStream) {
-      return true;
+    // fs.ReadStream in Node.js and Electron (but not in runtime like browserify)
+    if (typeof require === 'function') {
+      var fs
+      try {
+        fs = require('fs')
+      } catch (err) {}
+      if (fs && fs.ReadStream && param instanceof fs.ReadStream) {
+        return true;
+      }
     }
     // Buffer in Node.js
     if (typeof Buffer === 'function' && param instanceof Buffer) {