How to render a widget on the server side?

Question

JavaScript

There is a widget that is usually inserted into the html code of the page. Its code looks like this:

<script async src="//widget_domain.com/widget_code.js"></script>
<div class="widget" widget-id="..."></div>
<script>
window.widget.start()
</script>

After launch, the widget loads a few more JS files and creates div.widgetiframeone with its content.
Actually the question is: if there is a way to run this code on the server side in order to send an already created widget to the browser from iframeinside?

Answer 1

Rewrite the widget in something that can be done with SSR or PhantomJs.