笛卡尔坐标
折线图
type: 'line'标准折线图，用直线段连接数据点。支持标记、数据标签、区域、负值颜色、阶跃插值和虚线样式。
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
折线图
编辑 · JSON
数据格式
[10, 20, 30] · [[0,10],[1,20]] · [{ x: 0, y: 10 }]
数据结构
传入图表的 JSON——可直接放进你的 series。
series: [
{ name: '线上', data: [42, 48, 55, 51, 63, 71] },
{ name: '门店', data: [31, 34, 30, 37, 39, 44] }
]示例
import KatuCharts from 'katucharts.js';
KatuCharts.chart('container', {
chart: { type: 'line' },
xAxis: { categories: ['1月', '2月', '3月', '4月', '5月', '6月'] },
series: [
{ name: '线上', data: [42, 48, 55, 51, 63, 71] },
{ name: '门店', data: [31, 34, 30, 37, 39, 44], dashStyle: 'Dash' }
]
});类型特定选项
| 选项 | 描述 |
|---|---|
lineWidth | 线条宽度（默认2）。 |
dashStyle | 'Solid'、'Dash'、'Dot'、'DashDot'等。 |
marker | 点标记——{ symbol、radius、enabled }。 |
connectNulls | 从空值桥接间隙。 |
negativeColor | 低于阈值的值的颜色。 |
zones | 按值的范围着色。 |
step | 'left' | 'center' | 'right'阶跃插值。 |
变体
标记与虚线样式
为每个系列启用数据点标记，并用 dashStyle 区分线条。
KatuCharts.chart('container', {
chart: { type: 'line' },
series: [
{ name: '线上', data: [42, 48, 55, 51, 63, 71], marker: { enabled: true } },
{ name: '门店', data: [31, 34, 30, 37, 39, 44], dashStyle: 'Dash' }
]
});阶梯线与分区
阶梯插值配合按值分区，在阈值处为线条重新着色。
KatuCharts.chart('container', {
chart: { type: 'line' },
series: [{
data: [-6, -2, 4, 9, 16, 22], step: 'center',
dataLabels: { enabled: true, format: '{point.y}°' },
zones: [{ value: 0, color: '#2F6B5E' }, { color: '#B43417' }]
}]
});Common errors
- Why does my 折线图 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 折线图 chart in JavaScript?
- Install with `npm install katucharts.js`, then call KatuCharts.chart(container, { chart: { type: 'line' }, series: [...] }).
- Why does my 折线图 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.