What is the set state?

setState() allows you to change state in a React class component . To change the state of a function component, you use the useState() hook. Learn more about it here. setState() enqueues change to the component state and tell React that this component and its children need to be re-rendered with the updated state.

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When should state be used in React?

React uses an observable object as the state that observes what changes are made to the state and helps the component behave accordingly . For example, if we update the state of any component like the following the webpage will not re-render itself because React State will not be able to detect the changes made.8 Eki 2021

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