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An AI assistant is planned. Until it is genuinely useful we would rather point you at the page that actually answers your question.
React is a library for building user interfaces from components — self-contained pieces that describe what should appear for a given set of data. You describe the result you want and React works out the minimal set of DOM changes to get there.
It is a library rather than a framework, so routing, data fetching and build tooling are separate choices. That flexibility is why React underpins frameworks like Next.js rather than competing with them.
Suitability
And when it is not. Choosing the wrong tool costs more than any implementation detail.
In practice
Dashboards, editors and tools where state changes constantly and predictably managing it is the main challenge.
Typed component libraries with documented variants, so screens are assembled rather than hand-built.
Introducing React into part of an existing application without rewriting everything around it.
Considerations
Practical notes from running this in production.
FAQ
Tell us what you are trying to build or fix. We will come back with scope, approach and an honest view on cost and timeline.