Interview Q&A / React

1. What causes a React component to re-render?

   A component re-renders when its own state changes, when its parent re-renders, or when a context it reads changes. Changing a prop value does not itself trigger it; the parent re-rendering does. Plain variables and refs never cause a render.

   BeginnerQuick answer1 min read
2. What is code splitting and how does it make a React app load faster?

   Code splitting breaks the JavaScript bundle into smaller chunks that load on demand, for example per route. Users download only what the first screen needs, so the page becomes interactive sooner.

   BeginnerQuick answer1 min read