
React 19: "Cannot update a component while rendering a different component"
What this warning means, the two patterns that trigger it (derived state, callback refs), and how to move the update out of the render phase.
2posts

What this warning means, the two patterns that trigger it (derived state, callback refs), and how to move the update out of the render phase.

Why React throws 'Too many re-renders. React limits the number of renders...' and the two most common causes: setState in the render body and unstable effect dependencies.