车把加载png图像

Question

我正在构建带有手把和操纵up的pdf报告，以保存到我的数据库中。 pdf正常运行，除了我似乎无法获取存储在资产目录中的图像以进行加载。我在控制台上记录尝试获取图像时遍历的filePath，并且它们通过了适当的路径。只是不确定为什么不加载图像，需要任何帮助。

到目前为止，这是我的代码。

const puppeteer = require("puppeteer");
const hbs = require("handlebars");
const fs = require("fs-extra");
const path = require("path");

// compiles the handlebars docs
const compile = async (templateName, data) => {
  const filePath = path.join(__dirname, "templates", `${templateName}.hbs`);
  if (!filePath) {
    throw new Error(`Could not find ${templateName}.hbs in generatePDF`);
  }
  const html = await fs.readFile(filePath, "utf-8");
  return hbs.compile(html)(data);
};

// helper for getting the images
hbs.registerHelper("getIntro", (context, idx) => {
  const filePath = path.join(
    __dirname,
    "assets",
    `${context}_intro_${idx}.png`
  );
  return filePath;
});


// use puppeteer to take in compiled hbs doc and create a pdf
const generatePDF = async (fileName, data) => {
  const preparedData = prepareDataForPDF(data);
  const browser = await puppeteer.launch({
    args: ["--no-sandbox"],
    headless: true
  });
  const page = await browser.newPage();
  const content = await compile(fileName, preparedData);
  await page.goto(`data: text/html;charset=UTF-8, ${content}`, {
    waitUntil: "networkidle0"
  });
  await page.setContent(content);
  await page.emulateMedia("screen");
  await page.waitFor(100);

  const pdf = await page.pdf({
    format: "A4",
    printBackground: true
  });
  return pdf;
};

module.exports = generatePDF;

<!-- handlebars partial that handles image loading -->
    {{#loop 14}}
        <div class="page">
          <img src="{{getIntro assessmentType this}}" class="intro-page-content">
        </div>
    {{/loop}}

<!-- used like this in my main file -->
    {{> intro assessmentType="Leadership"}}