[BorisMelnik]

wow this is amazing. would love to see an offshoot of this where it could render a sitemap, or even keep a live sitemap up to date via cron.d or something (just hoping out loud)

[gildas]

You can use SEO4Ajax [1] to crawl your SPA and generate an up to date sitemap dynamically.

[1] http://www.seo4ajax.com/

[MichaelGG]

We're using Brombone. You give them your sitemap, they do the prerendering and save it all. Then you proxy to them for Googlebot and others.

[CMCDragonkai]

Dynamic constructions of sitemaps is surprisingly difficult. We would need to poll every single page you have, just to check if you potentially have a new link to a new page in your site. And everytime you add a new page, that's a whole another page to scrape and analyse.