[colordrops]

Everywhere I've worked would have judged heavy emphasis on framework expertise rather than fundamental CS concepts and web standards as a red flag. I don't think it's that rare.

Mentioning ability in React is obviously not a bad thing but some people make it their whole resume.

[jakub_g]

Counterargument: my colleague with 15y exp (10 C++ & 5 Angular/Vue) has been unemployed for 2yrs already because he has no React on the CV and no local company wants to hire him (secondary size tech hub in the country, EU). He's probably have to force-relocate soon.