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@so-chart/bar

v1.1.3

Published

柱状图

Readme

@so-chart/bar

基于 Canvas 绘制的柱状图包,提供基础分组柱状图、环形堆叠柱状图和趋势柱状图。

安装

pnpm add @so-chart/bar

最小用法

下面示例假设 container 是承载图表的 HTMLElement:

import getBarChart, { type BarOptions } from '@so-chart/bar';

const chart = getBarChart({
  container,
  chartType: 'bar',
  layout: { height: 320 },
});

const options: BarOptions = {
  xAxis: { type: 'category', data: ['A', 'B', 'C'] },
  yAxis: { type: 'value', data: { start: 0, end: 100 } },
  datasets: [{ label: 'Series', data: [20, 45, 80] }],
  tooltip: { show: true },
};

chart.setOption(options);

chartType 支持 bar、circleStackBar 和 trend,不同类型对应不同的选项类型。组件卸载或重新创建图表前,请调用 chart.dispose()。

柱宽与 hover 交互

趋势柱状图会根据 scaleBand 的实际带宽自适应柱宽。maxBarWidth 是最大值,barGap 是期望间距;当数据点较密时,间距会自动压缩,避免柱子退化为 1px 细线。Tooltip 命中使用 D3 quadtree 查找当前带宽内的最近柱位,鼠标经过柱间空隙时仍保持稳定命中。

基础分组柱状图在组间空白区域也会命中当前 x 轴分组内的最近柱位,鼠标从一组 bar 移向另一组 bar 时不会因为短暂经过空白而隐藏 Tooltip。

环形堆叠柱状图自适应

环形堆叠柱状图在未传入 innerRadius 或 outerRadius 时,会根据可用容器空间重新计算内外半径;显式半径超出可用区域时也会被限制。bar.minWidth、bar.maxWidth 和 bar.gap 控制柱子的切线宽度与间隙,默认值分别为 2px、24px 和 2px;数据点密集时会自动压缩间隙。x 轴标签默认自动降密,Tooltip 与绘制使用同一份角度区间进行命中。

CSP nonce

创建图表时可以传入 nonce。图表包不会生成 nonce,解析优先级为显式 nonce、宿主页面已有 script/style/link nonce,最后兼容 globalThis.__CSP_NONCE__。

TypeScript 类型

柱状图选项和实例类型由包入口直接导出:

import getBarChart, { type BarOptions, type BarChartInstance } from '@so-chart/bar';

示例与说明

  • 可运行示例:demo/examples
  • 配置与行为说明:demo/docs
  • 预览站和包独立 Demo 都从 demo/manifest.ts 读取示例关系;宿主接入仍以本 README、包入口和导出类型为准。