在 React 中如何使用 Echarts

1,062 阅读1分钟

Echarts 一个基于 JavaScript 的开源可视化图表库


1、如果要在你的项目中使用 Echarts , 实现先安装对应的包,从 npm 获取

npm install echarts

2、安装完成之后再文件内引入

import * as echarts from "echarts";

3、声明一个 ref 给展示图标的元素,声明属性值

     const chartRef = useRef<any>(null);

注意:展示图标的元素一定要加宽高,否则看不到图表的

    <>
      <div ref={chartRef} style={{ width: "500px", height: "350px" }}></div>
    </>

属性值

const optionData = {
    title: {
      text: "ECharts 入门示例",
    },
    tooltip: {},
    xAxis: {
      data: ["衬衫", "羊毛衫", "雪纺衫", "裤子", "高跟鞋", "袜子"],
    },
    yAxis: {},
    series: [
      {
        name: "销量",
        type: "bar",
        data: [5, 20, 36, 10, 10, 20],
      },
    ],
  };

4、使用,在挂载阶段渲染,关闭页面后销毁,以免内存泄漏

useEffect(() => {
    // 挂载阶段
    const chart = echarts.init(chartRef.current);
    chart.setOption(optionData);

    // 销毁
    return () => {
      chart.dispose();
    };
  }, []);

结果展示:

image.png

完整代码:

import * as echarts from "echarts";
import { useEffect, useRef } from "react";
const EchartsPage = () => {
  const chartRef = useRef<any>(null);
  const optionData = {
    title: {
      text: "ECharts 入门示例",
    },
    tooltip: {},
    xAxis: {
      data: ["衬衫", "羊毛衫", "雪纺衫", "裤子", "高跟鞋", "袜子"],
    },
    yAxis: {},
    series: [
      {
        name: "销量",
        type: "bar",
        data: [5, 20, 36, 10, 10, 20],
      },
    ],
  };

  useEffect(() => {
    // 挂载阶段
    const chart = echarts.init(chartRef.current);
    chart.setOption(optionData);

    // 销毁
    return () => {
      chart.dispose();
    };
  }, []);
  return (
    <>
      <div ref={chartRef} style={{ width: "500px", height: "350px" }}></div>
    </>
  );
};

export default EchartsPage;