i use barryvdh/laravel-dompdf in laravel 5.5 and bootstrap css (renamed to pdf.css with small adjustments) to generate a report in pdf this is my header from the report view calling the css:
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<link href="{{public_path('css/pdf.css') }}" rel="stylesheet" type="text/css" />
</head>
<body>
my controller:
public function infor(News $news)
{
...
PDF::setOptions(['dpi' => 150, 'defaultFont' => 'sans-serif']);
$pdf = PDF::loadView('admin.news_events.pdf');
return $pdf->stream('pdfview.pdf');
}

