Refactor code

Author: sangnguyenplus

src/HtmlBuilder.php

@@ -34,6 +34,10 @@ public function __construct(UrlGenerator $urlGenerator)
      */
     public function script($url, $attributes = [], $secure = null)
     {
+        if (!$url) {
+            return null;
+        }
+
         $attributes['src'] = $this->url->asset($url, $secure);
 
         return $this->toHtmlString('<script' . $this->attributes($attributes) . '></script>');
@@ -50,6 +54,10 @@ public function script($url, $attributes = [], $secure = null)
      */
     public function style($url, $attributes = [], $secure = null)
     {
+        if (!$url) {
+            return null;
+        }
+
         $defaults = [
             'media' => 'all',
             'type'  => 'text/css',
@@ -63,18 +71,6 @@ public function style($url, $attributes = [], $secure = null)
         return $this->toHtmlString('<link' . $this->attributes($attributes) . '>');
     }
 
-    /**
-     * Transform the string to an Html serializable object.
-     *
-     * @param $html
-     *
-     * @return \Illuminate\Support\HtmlString
-     */
-    protected function toHtmlString($html)
-    {
-        return new HtmlString($html);
-    }
-
     /**
      * Build an HTML attribute string from an array.
      *
@@ -99,6 +95,18 @@ public function attributes($attributes)
         return count($html) > 0 ? ' ' . implode(' ', $html) : '';
     }
 
+    /**
+     * Transform the string to an Html serializable object.
+     *
+     * @param $html
+     *
+     * @return \Illuminate\Support\HtmlString
+     */
+    protected function toHtmlString($html)
+    {
+        return new HtmlString($html);
+    }
+
     /**
      * Build a single attribute element.
      *