# # Pie

const config = { type: 'pie', data: data, options: { responsive: true, plugins: { legend: { position: 'top', }, title: { display: true, text: 'Chart.js Pie Chart' } } }, };

    const config = {
      type: 'pie',
      data: data,
      options: {
        responsive: true,
        plugins: {
          legend: {
            position: 'top',
          },
          title: {
            display: true,
            text: 'Chart.js Pie Chart'
          }
        }
      },
    };

const DATA_COUNT = 5; const NUMBER_CFG = {count: DATA_COUNT, min: 0, max: 100}; const data = { labels: ['Red', 'Orange', 'Yellow', 'Green', 'Blue'], datasets: [ { label: 'Dataset 1', data: Utils.numbers(NUMBER_CFG), backgroundColor: Object.values(Utils.CHART_COLORS), } ] };

    const DATA_COUNT = 5;
    const NUMBER_CFG = {count: DATA_COUNT, min: 0, max: 100};
    const data = {
      labels: ['Red', 'Orange', 'Yellow', 'Green', 'Blue'],
      datasets: [
        {
          label: 'Dataset 1',
          data: Utils.numbers(NUMBER_CFG),
          backgroundColor: Object.values(Utils.CHART_COLORS),
        }
      ]
    };

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(); } }, { name: 'Add Dataset', handler(chart) { const data = chart.data; const newDataset = { label: 'Dataset ' + (data.datasets.length + 1), backgroundColor: [], data: [], }; for (let i = 0; i < data.labels.length; i++) { newDataset.data.push(Utils.numbers({count: 1, min: 0, max: 100})); const colorIndex = i % Object.keys(Utils.CHART_COLORS).length; newDataset.backgroundColor.push(Object.values(Utils.CHART_COLORS)[colorIndex]); } chart.data.datasets.push(newDataset); chart.update(); } }, { name: 'Add Data', handler(chart) { const data = chart.data; if (data.datasets.length > 0) { data.labels.push('data #' + (data.labels.length + 1)); for (let index = 0; index < data.datasets.length; ++index) { data.datasets[index].data.push(Utils.rand(0, 100)); } chart.update(); } } }, { name: 'Remove Dataset', handler(chart) { chart.data.datasets.pop(); chart.update(); } }, { name: 'Remove Data', handler(chart) { chart.data.labels.splice(-1, 1); // remove the label first chart.data.datasets.forEach(dataset => { dataset.data.pop(); }); chart.update(); } } ];

    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();
        }
      },
      {
        name: 'Add Dataset',
        handler(chart) {
          const data = chart.data;
          const newDataset = {
            label: 'Dataset ' + (data.datasets.length + 1),
            backgroundColor: [],
            data: [],
          };
          for (let i = 0; i < data.labels.length; i++) {
            newDataset.data.push(Utils.numbers({count: 1, min: 0, max: 100}));
            const colorIndex = i % Object.keys(Utils.CHART_COLORS).length;
            newDataset.backgroundColor.push(Object.values(Utils.CHART_COLORS)[colorIndex]);
          }
          chart.data.datasets.push(newDataset);
          chart.update();
        }
      },
      {
        name: 'Add Data',
        handler(chart) {
          const data = chart.data;
          if (data.datasets.length > 0) {
            data.labels.push('data #' + (data.labels.length + 1));
            for (let index = 0; index < data.datasets.length; ++index) {
              data.datasets[index].data.push(Utils.rand(0, 100));
            }
            chart.update();
          }
        }
      },
      {
        name: 'Remove Dataset',
        handler(chart) {
          chart.data.datasets.pop();
          chart.update();
        }
      },
      {
        name: 'Remove Data',
        handler(chart) {
          chart.data.labels.splice(-1, 1); // remove the label first
          chart.data.datasets.forEach(dataset => {
            dataset.data.pop();
          });
          chart.update();
        }
      }
    ];

## # Docs

- Doughnut and Pie Charts