What are refs used for in React?
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What is “forward refs”?
What are the lifecycle methods of reactjs components?
What is SyntheticEvent?
Explain the different phases of react component’s lifecycle?
In which lifecycle event do you make ajax requests and why?
How react router is different from history library?
Explain error boundaries?
How do you create an event in react?
Does React re-render all components and sub components every time setState is called?
How can a browser read JSX file?
What is the difference between react components in es5 and es6?
How do you tell react to build in production mode and what will that do?