fix: better no mode warning message

jeremenichelli · jeremenichelli · commit 2b7ab5d41fea · 2018-03-28T15:05:15.000+02:00
diff --git a/lib/NoModeWarning.js b/lib/NoModeWarning.js
@@ -13,8 +13,10 @@ module.exports = class NoModeWarning extends WebpackError {
 		this.name = "NoModeWarning";
 		this.message =
 			"configuration\n" +
-			"The 'mode' option has not been set. " +
-			"Set 'mode' option to 'development' or 'production' to enable defaults for this environment. ";
+			"The 'mode' option has not been set, webpack will fallback to 'production' for this value. " +
+      "Set 'mode' option to 'development' or 'production' to enable defaults for each environment.\n" +
+      "You can also set it to 'none' to disable any default behavior. " +
+      "Learn more: https://webpack.js.org/concepts/mode/";
 
 		Error.captureStackTrace(this, this.constructor);
 	}
