Is React, Angular or Backbone bad for SEO?

I was about to give you a detailed answer to this problem but then remembered that searchengineland did a bit of a article regarding this. https://searchengineland.com/angular-universal-what-you-need-to-know-for-seo-311437 

Personally I would avoid these frameworks, its not that they are not good, its more the fact you are creating problems for yourself to solve before you even start.

These frameworks are excellent for dashboards, but for bots, they aren't so friendly.

There was an excellent experiment here: https://www.onely.com/blog/javascript-seo-experiment/

Which yielded these results for Angular JS

And React results (surprising)

Although Google claims they can now render the majority of Javascript, I'm actually quite skeptical. The image above confirms my skepticism. Yes, without question - they've improved, but I don't think it's worth it. Why make their life difficult? Furthermore, unless Bing has improved of late, they can't render Javascript full stop, so that also means you're discounting Bing, Yahoo, etc.

I'd also stick to html, css, and use JS only as an add-on.

These frameworks are excellent for dashboards, but for bots, they aren't so friendly.

There was an excellent experiment here: https://www.onely.com/blog/javascript-seo-experiment/

Which yielded these results for Angular JS

And React results (surprising)

Although Google claims they can now render the majority of Javascript, I'm actually quite skeptical. The image above confirms my skepticism. Yes, without question - they've improved, but I don't think it's worth it. Why make their life difficult? Furthermore, unless Bing has improved of late, they can't render Javascript full stop, so that also means you're discounting Bing, Yahoo, etc.

I'd also stick to html, css, and use JS only as an add-on.