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techarts

v1.0.6

Published

An out of the box Taro component for ECharts

Downloads

35

Readme

techarts

开箱即用的 Taro2 echarts 组件,不需要配置任何 "copy". 据有以下特性:

  • 支持多种使用方式。
  • 支持自定义构建的 echarts
  • 支持导出图片

如果你觉得解决了你的问题,并节省了时间,请在 github 上给我一个小星星 ^_^

安装

// 注意必须要加版本号,因为最新版本兼容了 Taro3 不兼容Taro2
npm install techarts@^1.0.5

使用

import EChart from 'techarts';
// 自定义构建的echarts
import * as echarts from './echarts';

// 基本用法
<EChart echarts={echarts} option={option} />;
// 通过组件实例设置数据
<EChart
  ref={(node) => {
    this.chart = node;
  }}
  echarts={echarts}
/>;
this.chart.setOption({...});
// 自定义初始化
<EChart echarts={echarts} onInit={this.onInit} />;

onInit = (canvas, width, height, dpr) => {
  const chart = echarts.init(canvas, null, {
    width: width,
    height: height,
    devicePixelRatio: dpr,
  });
  canvas.setChart(chart);
  chart.setOption(this.state.option);
  // this.chart = chart; // 通过chart也可以setOption
  // chart.on('click', e => {})
  // chat.on('selectchanged', e => {})
  return chart; // 必须return
};
// 以上三种用法可以结合使用

参数

| 参数名称 | 解释 | 默认值 | 是否必填 | | ------------ | -------------------------------------------------------------------------------------------------------------------------------- | ------ | -------- | | echarts | echarts 对象。建议去官网自定义构建;注意不要勾选“代码压缩”,可下载后自行压缩。 | - | Y | | option | 参数同echart option | - | Y | | canvasId | cancas-id 兼容低基础库版本(<2.9.0)时需要 | - | N | | disableTouch | 是否禁用手势 | false | N | | lazyLoad | 需要拿到组件实例手动 init 的时候请传递 true | false | N | | style | 样式 | - | N | | onInit | 需要自定义 echarts init 时使用(可用此方式给 echarts 绑定事件) | - | N |

实例 API

| API 名称 | 参数 | 回调参数 | | -------------------- | ---------------------------------------------------------------------------------------------------- | --------- | | init | callback | 同 onInit | | setOption | echart option | - | | canvasToTempFilePath | 同小程序 | 同小程序 | | getCanvasId | 获取容器 id | - |

示例

参照项目 demo 目录

注意事项

  • Taro H5 本地开发时样式加载延时,导致 echarts 初始化宽高读取错误。build 之后正常
  • canvasToTempFilePath h5 未实现定制宽高位置等功能

License

MIT@elvinzhu