React · Junior · Question 40 of 75

What is a "pure" component in React terms?

1A component with no styles and no CSS side dependencies
✓Correct answer: A component with no side effects in render and the same JSX for the same input
3Any component that extends React.PureComponent

Explanation

Rendering must be a pure computation: no mutating external variables, no requests, no DOM changes. Side effects belong in event handlers or useEffect. StrictMode, concurrent rendering and the React Compiler rely on purity.

What is a "pure" component in React terms?

Explanation

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