#タイムスケール - コンボチャート

const config = {
  type: 'line',
  data: data,
  options: {
    plugins: {
      title: {
        text: 'Chart.js Combo Time Scale',
        display: true
      }
    },
    scales: {
      x: {
        type: 'time',
        display: true,
        offset: true,
        time: {
          unit: 'day'
        }
      },
    },
  },
};

const DATA_COUNT = 7;
const NUMBER_CFG = {count: DATA_COUNT, min: 0, max: 100};
const labels = [];
for (let i = 0; i < DATA_COUNT; ++i) {
  labels.push(Utils.newDate(i));
}
const data = {
  labels: labels,
  datasets: [{
    type: 'bar',
    label: 'Dataset 1',
    backgroundColor: Utils.transparentize(Utils.CHART_COLORS.red, 0.5),
    borderColor: Utils.CHART_COLORS.red,
    data: Utils.numbers(NUMBER_CFG),
  }, {
    type: 'bar',
    label: 'Dataset 2',
    backgroundColor: Utils.transparentize(Utils.CHART_COLORS.blue, 0.5),
    borderColor: Utils.CHART_COLORS.blue,
    data: Utils.numbers(NUMBER_CFG),
  }, {
    type: 'line',
    label: 'Dataset 3',
    backgroundColor: Utils.transparentize(Utils.CHART_COLORS.green, 0.5),
    borderColor: Utils.CHART_COLORS.green,
    fill: false,
    data: Utils.numbers(NUMBER_CFG),
  }]
};

const actions = [
  {
    name: 'Randomize',
    handler(chart) {
      chart.data.datasets.forEach(dataset => {
        dataset.data = Utils.numbers({count: chart.data.labels.length, min: 0, max: 100});
      });
      chart.update();
    }
  },
];