如何在NodeJS API中生成包含eCharts内容的PDF

npm install puppeteer echarts

const puppeteer = require('puppeteer');
const echarts = require('echarts');

const chartData = {
  // 图表数据
};

const chartOptions = {
  // 图表配置
};

const chart = echarts.init(document.createElement('div'));
chart.setOption(chartOptions);
chart.setOption('series', chartData);

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();

  await page.setContent(chart.getDom().outerHTML);
  await page.evaluate(() => {
    const chartElement = document.querySelector('div');
    const canvas = document.createElement('canvas');
    const ctx = canvas.getContext('2d');
    const chart = echarts.getInstanceByDom(chartElement);

    canvas.width = chartElement.offsetWidth;
    canvas.height = chartElement.offsetHeight;
    ctx.clearRect(0, 0, canvas.width, canvas.height);
    chart.resize();
    chart.renderToCanvas(canvas);

    chartElement.parentNode.replaceChild(canvas, chartElement);
  });

  await page.pdf({ path: 'chart.pdf', format: 'A4' });

  await browser.close();
})();

node generatePDF.js