In the Russian SEO forums, a user has provided evidence that Yandex may be now capable of indexing SPA (single page application) websites.
However, forum user piatachki has shared the below via the SearchEngines.guru forum: Unlikely, but it seems Yandex has indexed the SPA
Whilst piatachki hasn’t shared details of the site in question (at the time of writing), they wrote:
The situation is this: for the third month I have been drinking SPA on a pure angular without SSR, pre-rendering and html versions. In short, it simply cannot be indexed by yash. Attendance – 0, Metric is not connected, sitemap is missing, there are no external links. Saw on Linux in pure firefox in incognito. The site was added to Google Search Console and Ya.Webmaster. Google is slowly indexing (but no visits, I’m sure). Yandex at the beginning of January pulled one page without the DOM, since it does not know how to use SPA. And today I come in, I started gutting the site on February 23rd. The urls are the freshest.
With the screenshot:
At the time of writing, no further information is known around this development.