renderMarkdown (html, renderStatic = false) {
    this.clearup()
    const printContainer = document.createElement('article')
    printContainer.classList.add('print-container')
    this.container = printContainer
    printContainer.innerHTML = html

    // Fix images when rendering for static files like PDF (GH#678).
    if (renderStatic) {
      // Traverse through the DOM tree and fix all relative image sources.
      const images = printContainer.getElementsByTagName('img')
      for (const image of images) {
        const rawSrc = image.getAttribute('src')
        image.src = getImageInfo(rawSrc).src
      }
    }
    document.body.appendChild(printContainer)
  }
Prepare document export and append a hidden print container to the window.

@param {string} html HTML string
@param {boolean} [renderStatic] Render for static files like PDF documents