updateCardTextReducer.js

export function updateCardTextReducer(cardId, event) {
  event.persist();
  return function updateCard(state) {
    const {cards, cardIds} = state;
    const index = cardIds.indexOf(cardId);
    const card = getCardById(cardId, cards);
    const newCardUpdatedText = {
            ...card,
            text: event.target.value
      };
     const newCards = [
              ...cards.slice(0,index),
              newCardUpdatedText,
              ...cards.slice(index + 1)
      ];
      const newState = {
        ...state,
        cards: newCards
      };
      setToLocalStorage(APP_STATE_EDITING, newState);
      return newState;
  }
}