How setState works in React?

Question

Accepted Answer

setState is a method used in React to update the state of a component.

setState is asynchronous and batched for performance optimization.
It merges the new state with the previous state.
It schedules a re-render of the component and its children.
Passing a function to setState ensures the previous state is used correctly.
Example: this.setState({ count: this.state.count + 1 })

Accepted Answer

setState() is a method in React that allows you to update the state of a component. When setState() is called, React will re-render the component and its children with the updated state.

Here's a brief overview of how setState() works in React:

When you call setState(), React merges the updated state into the current state of the component. It does not replace the entire state object, but only updates the properties that you specify.
React then schedules a re-render of the component and its children. The re-render is asynchronous, which means that it does not happen immediately. Instead, React batches multiple state updates together for performance reasons.
After the re-render is complete, React will call the render() method of the component to generate the updated UI based on the new state. React will also update the DOM to reflect the changes in the UI.

How setState works in React?

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