Update Button.php

add addClass method

Author: matteo-costantini-apconsulting

src/Html/Button.php

@@ -113,6 +113,23 @@ public function className($value)
         return $this;
     }
 
+    /**
+     * Append a class name to column.
+     *
+     * @param string $class
+     * @return $this
+     */
+    public function addClass($class)
+    {
+        if (! isset($this->attributes['className'])) {
+            $this->attributes['className'] = $class;
+        } else {
+            $this->attributes['className'] .= " $class";
+        }
+
+        return $this;
+    }
+
     /**
      * Set text option value.
      *