Chartjs-How to make Laravel Charts

Who are interested, I found solution. Here is the code:

<?php

namespace App\Http\Controllers;

use App\Content;
use App\Charts\UserLineChart;

use Illuminate\Http\Request;

class ChartController extends Controller
{

  public function index(Request $request)
  {
    $content = Content::where('vei_sn', '23333')->get();
    if ($request->has('date_from') && $request->input('date_from') != '' && $request->has('date_to') && $request->input('date_to') != '') {
        $datefrom = $request->input('date_from');
        $dateto = $request->input('date_to');
        // $content = $content->where(function($query) use ($datefrom, $dateto){
        //                            $query->whereBetween('op_date',array($datefrom, $dateto));
        //                          });
        $content = $content->whereBetween('op_date', [$datefrom, $dateto]);
    }

      $OBD = $content->where('con_type', 'OBD')->count();
      $DC = $content->where('con_type', 'DC')->count();
      $BSL = $content->where('con_type', 'BSL')->count();
      $content = $content->pluck('con_type', 'con_type');

      $chart = new UserLineChart;

      $chart->labels($content->values());

      $chart->dataset('Connections', 'bar', [$OBD, $DC, $BSL])->backgroundColor([
         'red',
         'green',
         'yellow'
      ]);
      return view('chart.index', compact('chart'));
  }
}