Create a chart

  <!--HTML-->
  <div id="chart"></div>

  // Javascript
  let chart = new Chart( "#chart", { // or DOM element
    data: {
      labels: ["12am-3am", "3am-6am", "6am-9am", "9am-12pm",
      "12pm-3pm", "3pm-6pm", "6pm-9pm", "9pm-12am"],

      datasets: [
        {
          label: "Some Data", type: 'bar',
          values: [25, 40, 30, 35, 8, 52, 17, -4]
        },
        {
          label: "Another Set", type: 'bar',
          values: [25, 50, -10, 15, 18, 32, 27, 14]
        },
        {
          label: "Yet Another", type: 'line',
          values: [15, 20, -3, -15, 58, 12, -17, 37]
        }
      ],

      yMarkers: [{ label: "Marker", value: 70 }],
      yRegions: [{ label: "Region", start: -10, end: 50 }]
    },

    title: "My Awesome Chart",
    type: 'axis-mixed', // or 'bar', 'line', 'pie', 'percentage'
    height: 250,
    colors: ['purple', '#ffa3ef', 'red']
  });

Update Values

Plot Trends

Listen to state change

  ...
    isNavigable: 1, // Navigate across data points; default 0
  ...

  chart.parent.addEventListener('data-select', (e) => {
    update_moon_data(e.index); // e contains index and value of current datapoint
  });

And a Month-wise Heatmap

  let heatmap = new Chart("#heatmap", {
    type: 'heatmap',
    height: 115,
    data: heatmapData,  // object with date/timestamp-value pairs

    discreteDomains: 1  // default: 0

    start: startDate,
                  // A Date object;
                  // default: today's date in past year
                  //          for an annual heatmap

    legendColors: ['#ebedf0', '#fdf436', '#ffc700', '#ff9100', '#06001c'],
                  // Set of five incremental colors,
                  // beginning with a low-saturation color for zero data;
                  // default: ['#ebedf0', '#c6e48b', '#7bc96f', '#239a3b', '#196127']

  });

Available options:

  ...
  {
    data: {
      labels: [],
      datasets: [],
      yRegions: [],
      yMarkers: []
    }
    title: '',
    colors: [],
    height: 200,

    tooltipOptions: {
      formatTooltipX: d => (d + '').toUpperCase(),
      formatTooltipY: d => d + ' pts',
    }

    // Axis charts
    isNavigable: 1,        // default: 0
    valuesOverPoints: 1,   // default: 0
    barOptions: {
      stacked: 1           // default: 0
    }

    lineOptions: {
      dotSize: 6,          // default: 4
      hideLine: 0,         // default: 0
      hideDots: 1,         // default: 0
      heatline: 1,         // default: 0
      regionFill: 1        // default: 0
    }

    axisOptions: {
      yAxisMode: 'span',   // Axis lines, default
      xAxisMode: 'tick',   // No axis lines, only short ticks
      xIsSeries: 1         // Allow skipping x values for space
                           // default: 0
    },

    // Pie/Percentage charts

    maxLegendPoints: 6,    // default: 20
    maxSlices: 10,         // default: 20

    // Heatmap

    discreteDomains: 1,    // default: 1
    start: startDate,      // Date object
    legendColors: []
  }
  ...

    // Updating values
    chart.update(data);

    // Axis charts:
    chart.addDataPoint(label, valueFromEachDataset, index)
    chart.removeDataPoint(index)
    chart.updateDataset(datasetValues, index)

  

Install

Install via npm

  npm install frappe-charts

And include it in your project

  import Chart from "frappe-charts/dist/frappe-charts.min.esm"

... or include it directly in your HTML

  <script src="https://unpkg.com/frappe-charts@1.0.0/dist/frappe-charts.min.iife.js"></script>