npm install chart.js --save
bower install chart.js --save

https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.bundle.js
https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.bundle.min.js
https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.js
https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.min.js

<canvas id="my_chart" width="300" height="300"></canvas>

  public function GetChartData(){
    $my_data = array();
    array_push($today_data, VisitCapacity::where('my_data','>=', Carbon::today())->where('site',1)->count());
    array_push($today_data, VisitCapacity::where('my_data','>=', Carbon::today())->where('site',2)->count());
    array_push($today_data, VisitCapacity::where('my_data','>=', Carbon::today())->where('site',3)->count());
    array_push($today_data, VisitCapacity::where('my_data','>=', Carbon::today())->where('site',4)->count());
    Log::info(json_encode($my_data));
    return $my_data;
  }

 Route::get('get_chart_data', 'Member\UserController@GetChartData');

$.get('get_chart_data',function (data, status) {
var ctx = document.getElementById("my_chart").getContext("2d");
      var my_chart = new Chart(ctx,{
        type: 'pie',
        data: {
          labels: [
            "首页文章列表",
            "分类文章列表",
            "文章详情",
            "关于我",
          ],
          datasets: [{
            data: data,
            backgroundColor: [
              window.chartColors.red,
              window.chartColors.orange,
              window.chartColors.purple,
              window.chartColors.green,
            ],
          }]
        },
        options: {
          responsive: true,
        }
      });
});

window.chartColors = {
  red: 'rgb(255, 99, 132)',
  orange: 'rgb(255, 159, 64)',
  yellow: 'rgb(255, 205, 86)',
  green: 'rgb(75, 192, 192)',
  blue: 'rgb(54, 162, 235)',
  purple: 'rgb(153, 102, 255)',
  grey: 'rgb(201, 203, 207)'
};