Add better notification if config isn't published

src/JavaScriptException.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Laracasts\Utilities\JavaScript;
+
+class JavaScriptException extends \Exception {
+
+    /**
+     * The exception message.
+     *
+     * @var string
+     */
+    protected $message =
+        'JavaScript configuration must be published. Use: "php artisan vendor:publish".';
+}

src/JavascriptServiceProvider.php

@@ -21,6 +21,10 @@ public function register()
             $view = config('javascript.bind_js_vars_to_this_view');
             $namespace = config('javascript.js_namespace');
 
+            if (is_null($view)) {
+                throw new JavaScriptException;
+            }
+
             $binder = new LaravelViewBinder($app['events'], $view);
 
             return new PHPToJavaScriptTransformer($binder, $namespace);