mix() method not working in Blade templates

Hello, I am on Laravel Framework version 5.3.28 and have installed Laravel Mix via NPM. Using the version() API option results in the following error in my blade template: Call to undefined function mix() (View: /var/www/html/servicedesk/resources/views/welcome.blade.php)

I am implementing in the following way, per docs:

<link rel="stylesheet" href="{{ mix('css/app.css') }}">
<script src="{{ mix('js/app.js') }}"></script>

How can I resolve this?

[7ammer]

Try this:

function cache_buster($asset_url) {
  try {
    $file = file_get_contents(base_path() . "/public/mix-manifest.json");
  } catch (Exception $e){
    return url('/') . $asset_url;
  }

  $json = json_decode($file, true);

  foreach ($json as $key => $a) if($asset_url == $key) return url('/') . $a;

  return url('/') . $asset_url;
}

[Germey]

mix method will be supported since 5.4.x? How can I add it in 5.3.x?