饼图 / 层级
环形图
type: 'donut'挖空内半径的饼图。与设置innerSize的饼图相同。
编辑右侧的JSON并按Run（或⌘/Ctrl + Enter）——数据、标题、类别和颜色全部实时更新。
实时
环形图
编辑 · JSON
数据格式
{ name, y }
数据结构
传入图表的 JSON——可直接放进你的 series。
data: [
{ name: 'A', y: 35 },
{ name: 'B', y: 25 },
{ name: 'C', y: 40 }
]示例
import KatuCharts from 'katucharts.js';
KatuCharts.chart('container', {
chart: { type: 'donut' },
series: [{
innerSize: '60%',
data: [
{ name: 'A', y: 35 },
{ name: 'B', y: 25 },
{ name: 'C', y: 40 }
]
}]
});类型特定选项
| 选项 | 描述 |
|---|---|
innerSize | 孔径，例如'60%'。 |
（所有饼图选项） | 中心、角度、切片偏移。 |
变体
半圆环
通过 startAngle / endAngle 实现半环——适合展示单一比例。
KatuCharts.chart('container', {
chart: { type: 'donut' },
series: [{
innerSize: '60%', startAngle: -90, endAngle: 90,
dataLabels: { enabled: true, format: '{point.name}: {point.y}' },
data: [{ name: 'Used', y: 68 }, { name: 'Free', y: 32 }]
}]
});Common errors
- Why does my 环形图 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 环形图 chart in JavaScript?
- Install with `npm install katucharts.js`, then call KatuCharts.chart(container, { chart: { type: 'donut' }, series: [...] }).
- Why does my 环形图 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.