Interview Q&A / React
React interview questions
Rendering, state, hooks, keys and effects, explained with small examples.
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- What is the difference between controlled and uncontrolled components in React?
In a controlled component, React state holds the input's value and every change goes through an onChange handler. In an uncontrolled component, the browser DOM keeps the value and you read it when needed, for example with a ref or from the form data on submit.
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