> But do we really need a separate template for this? Why not just render everything inside the App component? Yes, you could do it, as long as you are okay with invalid HTML markup and not being able to include inline script tags like Google Analytics directly in the App component. But having said that, invalid markup is probably not relevant to SEO anymore and there are workarounds to include inline script tags in React components. So it's up to you, but for the purposes of this tutorial we will be using a Swig template.

- prepend '<!DOCTYPE html>' to the resulting HTML

- attribute "prefix" in head tag "<title>" wasn't outputted, so until it's fixed in the library, I just use a data attribute "data-replace-prefix" and removed the extra "data-replace-" from the resulting HTML

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Also, he could include inline scripts (like Google Analytics) this way:

  return <script dangerouslySetInnerHTML={{__html: "THE_JS_CODE"}}></script>;