Google updated its JavaScript SEO basics documentation to clarify that may skip rendering and JavaScript execution.
Google noted that if the HTTP status code is non-200 (for example, on error pages with 404 status code), rendering might be skipped.
In the Code Anthem blog post Bad Code is Viral, Amber Shah describes why “writing bad code is viral.” This is a great post that reminds me of a pattern I have seen repeatedly: bad code does seem to ...