let data_linear = {
  labels: ["01.05", "02.05", "03.05", "04.05", "05.05", "06.05", "07.05", "08.05", "09.05", "10.05", "11.05", "12.05", "01.05", "02.05", "03.05", "04.05", "05.05", "06.05", "07.05", "08.05", "09.05", "10.05", "11.05", "12.05", "07.05", "08.05", "09.05", "10.05", "11.05", "12.05"],
  datasets: [{
    label: 'Количество нажатий',
    data: [423, 595, 755, 415, 553, 552, 602, 653, 552, 701, 721, 793, 423, 595, 755, 415, 553, 552, 602, 653, 552, 701, 721, 793, 552, 602, 653, 552, 701, 721, 793],
    // showLine: false,
    // spanGaps: true,
    backgroundColor: function(context) {
      const chart = context.chart;
      const {
        ctx,
        chartArea
      } = chart;
      if (!chartArea) {
        // This case happens on initial chart load
        return null;
      }
      return getGradient(ctx, chartArea);
    },
    tension: .4,
    fill: true,
    pointRadius: 0,
    pointHitRadius: 20,
  }]
};
let lineChart = new Chart(document.querySelector('#linearChart'), {
  type: 'line',
  data: data_linear,
  options: {
    plugins: {
      legend: {
        display: false,
      }
    }
  }
});