12、React Hooks: Handling Forms, Avoiding UI Blocking, and Implementing Optimistic Updates

React Hooks: Handling Forms, Avoiding UI Blocking, and Implementing Optimistic Updates

1. Introduction to the Action State Hook

The Action State Hook is defined as:

const [state, action, isPending] = useActionState(actionFn, initialState)

To define this hook, at least a function ( actionFn ) should be provided as an argument. This function will be called when the form is submitted, and it has the following signature:

function actionFn(currentState, formData) {
  // Function body
}

The actionFn receives the current state of the action as the first argument and the form data (as a FormData obje