Migrating from Any to Unknown for Action Types

// Initial setup using 'any' for the action payload
interface ActionAny {
  type: string;
  payload: any; // This is unsafe, as 'any' could be anything
}

// Function that dispatches an action
function dispatchAnyAction(action: ActionAny) {
  // Action dispatch logic...
}

// Example usage of dispatching with 'any'
dispatchAnyAction({
  type: 'UPDATE_SESSION',
  payload: 123 // This is not type-checked
});

// Migration to 'unknown' for improved type safety
interface ActionUnknown {
  type: string;
  payload: unknown; // More type-safe than 'any'
}

// Function that dispatches an action with stricter type checking
function dispatchUnknownAction(action: ActionUnknown) {
  // Extra type checks can be performed here
  if (typeof action.payload === 'number') {
    // Handle number payload
  } else if (typeof action.payload === 'string') {
    // Handle string payload
  }
  // Action dispatch logic...
}

// Example usage of dispatching with 'unknown'
dispatchUnknownAction({
  type: 'UPDATE_SESSION',
  payload: 123 // Now, we must ensure payload is of the expected type
});