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React
Frontend
React
Component-based UI library: virtual DOM, hooks and state management.
30
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Junior
10
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12
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8
React questions
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›
What is the Virtual DOM and why does React use it?
Junior
#Rendering
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What is JSX and how does it become JavaScript?
Junior
#Jsx
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›
What is the difference between props and state?
Junior
#State
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›
How does the useState hook work?
Junior
#Hooks
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What is useEffect and when does it run?
Junior
#Hooks
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Why do list items need a key, and why not use the index?
Junior
#Rendering
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What is the difference between controlled and uncontrolled inputs?
Junior
#Forms
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What are the ways to render content conditionally in React?
Junior
#Rendering
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How does event handling work in React (synthetic events)?
Junior
#Events
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What are React Fragments and why use them?
Junior
#Rendering
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