diff --git a/src/js/index.js b/src/js/index.js
index b99dca9..593255e 100644
--- a/src/js/index.js
+++ b/src/js/index.js
@@ -168,7 +168,7 @@ const handle_enter = function () {
                     value = value.description;
                 }
             } catch (exception) {
-                value = exception ? exception.message : undefined;
+                value = exception.message;
             }
             command_history_element.innerText += value.toString() + "\n";
             command_history.push(command);
diff --git a/webpack.config.js b/webpack.config.js
index 0ba298c..738094f 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -2,7 +2,7 @@ const path = require('path');
 const HtmlWebpackPlugin = require("html-webpack-plugin");
 
 module.exports = {
-    mode: 'production',
+    mode: 'development',
     entry: './src/js/index.js',
 
     output: {