PDF Generation in Node

module.exports.generatePdf = async ()=>{

async function Html() {
    
    try {

      const data = {
        name: 'Faizan'
      }

      const templatePath = Path.resolve('./views/invoice.handlebars');

        
      const content = await ReadFile(templatePath, 'utf8')

      // compile and render the template with handlebars
      const template = Handlebars.compile(content)

      return template(data)
    } catch (error) {
      throw new Error('Cannot create invoice HTML template.')
    }
  }



    async function startBrowser() {
      const browser = await Puppeteer.launch();
      const page = await browser.newPage();
      return {browser, page};
    }

    async function closeBrowser(browser) {
        return browser.close();
    }

    async function html2pdf() {
        const {browser, page} = await startBrowser();
        const html = await Html()
        await page.setContent(html)
        await page.setContent(html) //with double work fine but not one line need to check later
        // await page.emulateMedia('screen');

        // await page.pdf({path: 'page.pdf'}); //for file
        let buffer = await page.pdf();   //for buffer
        return buffer;
    }

    (async () => {
        await html2pdf();
        process.exit(1);
    })();
      
}