setState callback

setState in React is a function. It is accessible within the component and updates the state which then triggers the render-ing of the component with the updated state data. However, React setState does not ensure re-rendering immediately as it is called, resulting in the rendering of data with previous state data. we can think of setState as a request for rendering the component which may get stuck or delay due to any of the reasons of react - redux lifecycle or a bugged code.
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