Why Doesn't My React setState Update My State Immediately?

React setState Retains Outdated State

Problem

In this React application, a state variable (dealersOverallTotal) is not updating correctly. The issue persists even after using a setTimeout to delay the setState call. Despite console.log statements confirming that the variable total holds the correct value, dealersOverallTotal remains unchanged.

Solution

The root cause lies in the asynchronous nature of the setState method. When console.log is used to inspect the state immediately after calling setState, it retrieves the old state value. To access the updated state, the callback function provided to setState can be utilized:

Within the callback, the updated state is guaranteed to be available, ensuring accurate logging of the state value. By following this practice, developers can confidently rely on the state being up-to-date when accessing it after a setState call.

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