Pie

Edit the JSON on the right and press Run (or ⌘/Ctrl + Enter) — data, titles, categories and colors all update live.

Data format

Data shape

The JSON you pass inside the chart — drop it straight into your series.

data: [
  { name: 'A', y: 45 },
  { name: 'B', y: 30 },
  { name: 'C', y: 25 }
]

Example

import KatuCharts from 'katucharts.js';

KatuCharts.chart('container', {
  chart: { type: 'pie' },
  series: [{
    data: [
      { name: 'A', y: 45 },
      { name: 'B', y: 30 },
      { name: 'C', y: 25 }
    ]
  }]
});

Type-specific options

Variations

KatuCharts.chart('container', {
  chart: { type: 'pie' },
  series: [{
    dataLabels: { enabled: true, format: '{point.name}: {point.percentage:.0f}%' },
    data: [
      { name: 'Product A', y: 35, sliced: true },
      { name: 'Product B', y: 25 }
    ]
  }]
});

KatuCharts.chart('container', {
  chart: { type: 'pie' },
  drilldown: {
    series: [
      { id: 'emea', name: 'EMEA',
        data: [{ name: 'UK', y: 18 }, { name: 'Germany', y: 14 }] }
    ]
  },
  series: [{
    data: [
      { name: 'EMEA', y: 42, drilldown: 'emea' },
      { name: 'APAC', y: 25, drilldown: 'apac' }
    ]
  }]
});

Common errors

Why does my pie chart render as a line chart?

The chart type was not registered. KatuCharts logs "KatuCharts: unknown series type "<type>", falling back to line" and draws a line chart rather than throwing. Import the module the type belongs to — for example `import 'katucharts.js/bio';` — before creating the chart.

Why do I get "Cannot read properties of null (reading 'appendChild')"?

The container element does not exist when the chart is created. Create the chart after the element is in the DOM: in React that means inside useEffect, not during render.

Why is the chart rendering with zero height?

The container has no height. A div with no content collapses to zero. Give it a height in CSS, or pass `chart: { height: 400 }` in the options.

FAQ

How do I create a pie chart in JavaScript?

Install with `npm install katucharts.js`, then call KatuCharts.chart(container, { chart: { type: 'pie' }, series: [...] }).

Why does my pie chart render as a line chart?

The chart type was not registered. KatuCharts logs "KatuCharts: unknown series type "<type>", falling back to line" and draws a line chart rather than throwing. Import the module the type belongs to — for example `import 'katucharts.js/bio';` — before creating the chart.

Why do I get "Cannot read properties of null (reading 'appendChild')"?

The container element does not exist when the chart is created. Create the chart after the element is in the DOM: in React that means inside useEffect, not during render.

Why is the chart rendering with zero height?

The container has no height. A div with no content collapses to zero. Give it a height in CSS, or pass `chart: { height: 400 }` in the options.