Great question! To update the state based on its previous value, you can use the useState hook in React. The useState hook returns an array with two elements - the current state value and a function to update it. To update the state based on its previous value, you can pass a function to the update function instead of a new value. The function receives the previous state as its argument and returns the new state value. This way, you can ensure that the state is updated correctly even if multiple updates are happening simultaneously. For more information on using useState in React, you can check out this React useState blog. Thanks for asking! copycat.dev/blog/react-usestate-hook