Why Doesn't `console.log` Show the Updated State After `setState()` in React?

Asynchronicity in React's setState() Method

React's setState() method is generally asynchronous, implying that when you console.log the state right after calling it, it might not yet be updated.

In the provided code snippet, you correctly calculate the total in total and pass it to the setState() method to update the dealersOverallTotal state. However, the code logs this.state.dealersOverallTotal immediately afterward, which may disclose the incorrect value because the state has not had enough time to update.

To ensure that you log the updated state value, place the log within the setState() callback function, which executes after the state change is complete:

this.setState({ dealersOverallTotal: total }, () => {
  console.log(this.state.dealersOverallTotal, 'dealersOverallTotal1');
});

This modification ensures that the console.log statement executes only after the state has been updated, hence displaying the correct total.

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