Googlebot is using Chrome 41
Google Indexing is a Two-Pass Process
Indexing is delayed for pure client side sides. Google indexer is two-pass, first run is without js, then week later it’s with is (or there abouts)
Yeah, there’s no fixed timeframe — the rendering can happen fairly quickly in some cases, but usually it’s on the order of days to a few weeks even. If your site produces new / updated content frequently & you want it indexed quickly, you need that content in the HTML.
The Take Away