I built a single page application using Angular. Google began executing JavaScript during its crawling process back in mid-2014, which makes me wonder if Yahoo and Bing also process JavaScript similarly when indexing pages.
Should I modify my Prerender.io configuration to support these search engines, or is their JavaScript handling managed automatically?
In my experience developing single page applications, I noticed that while Bing and Yahoo do attempt to execute JavaScript, their capabilities are not as sophisticated as Google’s. This doesn’t necessarily mean they won’t render your content correctly, but there have been instances where some dynamic content was not indexed as expected without prerendering. When working on Angular applications, I opted to use prerendering to ensure a consistent crawl experience across different search engines. It might be beneficial to assess your traffic sources and index data to decide if adjustments are necessary for Bing and Yahoo.
Based on my observations managing Angular applications, I have noticed that while Google’s crawler handles JavaScript very effectively, Bing and Yahoo tend to show varied results. At times, certain dynamic elements may not be fully rendered, which can impact SEO for increasingly competitive niches. In my practice, I have configured Prerender.io even for Bing and Yahoo to ensure consistency in content indexing. This approach reduces uncertainty and guarantees that search engines always see the complete content, an advantage especially useful when relying on dynamic data.
in my experience, while bing and yahoo do run js, there’s occasional skips on dynamic content. i used prerender as a safety net for my angular app, and it helped a lot. could be overkill for some sites but worth it if you want consistency.
I encountered similar issues during the development of an Angular-based website. Although Google’s crawler consistently renders dynamic content, in my own testing both Bing and Yahoo occasionally missed some JavaScript-driven elements. I ended up adjusting my setup by using Prerender.io to support consistent content rendering for all crawlers. This ensured that the core information was always visible, irrespective of the browsing agent used by the search engine. Although it might seem redundant, especially if your site isn’t heavily dependent on dynamic content, I found the extra step helpful for maintaining steady SEO performance.
In my experience, both Bing and Yahoo manage to process JavaScript, but their effectiveness does not match that of Google’s crawler. I once tested an Angular application and found that without prerendering, some dynamic content was inconsistently indexed. This led me to implement a prerendering solution which ensured that key content was visible and properly indexed regardless of the search engine. Although additional configuration can seem unnecessary when assuming all crawlers are up to date, the resulting consistency in SEO performance made the extra effort worthwhile.