how to add bar chart using chartjs code example

Example 1: chartjs line and bar order

var mixedChart = new Chart(ctx, {
   type: 'bar',
   data: {
       datasets: [{
           label: 'Bar Dataset',
           data: [10, 20, 30, 40],
           // this dataset is drawn below
           order: 2
       }, {
           label: 'Line Dataset',
           data: [10, 10, 10, 10],
           type: 'line',
           // this dataset is drawn on top
           order: 1
       }],
       labels: ['January', 'February', 'March', 'April']
   },
   options: options
});

Example 2: chart . js bar

new Chart(document.getElementById("mixed-chart"), {
    type: 'bar',
    data: {
      labels: ["1900", "1950", "1999", "2050"],
      datasets: [{
          label: "Europe",
          type: "line",
          borderColor: "#8e5ea2",
          data: [408,547,675,734],
          fill: false
        }, {
          label: "Africa",
          type: "line",
          borderColor: "#3e95cd",
          data: [133,221,783,2478],
          fill: false
        }, {
          label: "Europe",
          type: "bar",
          backgroundColor: "rgba(0,0,0,0.2)",
          data: [408,547,675,734],
        }, {
          label: "Africa",
          type: "bar",
          backgroundColor: "rgba(0,0,0,0.2)",
          backgroundColorHover: "#3e95cd",
          data: [133,221,783,2478]
        }
      ]
    },
    options: {
      title: {
        display: true,
        text: 'Population growth (millions): Europe & Africa'
      },
      legend: { display: false }
    }
});

Example 3: chartjs horizontal bar data in front

options: {
  responsive: true,
    maintainAspectRatio: false,
      hover: {
        animationDuration: 0
      },
        animation: {
          duration: 1,
            onComplete: function() {
              let chartInstance = this.chart,
                  ctx = chartInstance.ctx;

              ctx.textAlign = 'center';
              ctx.textBaseline = 'bottom';

              this.data.datasets.forEach(function(dataset, i)
                                         {
                let meta = chartInstance.controller.getDatasetMeta(i);
                meta.data.forEach(function(bar, index) {
                  let data = dataset.data[index];
                  ctx.fillText(data, bar._model.x + 15 , bar._model.y + 5);
                });
              });
            }
        }
},