Downloading JavaScript-based sites

If a site is created entirely in JS, like a Node-based site, SiteSucker might have trouble downloading it, since the markup is rendered by the browser, not served by the server. To do this, you'll need to use "Download Using Web Views".

That's under Webpage > Options. Turn that on. That means SiteSucker will first render the page as if it were a browser, and then download the rendered version.