/Javascript/React/React redux how to change object value in reducer

React redux how to change object value in reducer

Update State in react redux reducer

case foodConstants.FOOD_SUCCESS_POST: {

  let updatedItems = { ...state.items };
  const itemIndex = updatedItems.findIndex((food1) => food1.id === action.id);

  if(itemIndex > -1){
    updatedItems[itemIndex] = {
        ...updatedItems[itemIndex],
        ...action,
    }
  }

 return { ...state, items: updatedItems };
}

Source: stackoverflow.com

Update State in react redux reducer

case foodConstants.FOOD_SUCCESS_POST: {

  const updatedItems = state.items.map((food1) => {
    if (food1.id === action.id) {
      return { ...action };
    }

    return food1;
  });
 return { ...state, items: updatedItems };
}

Source: stackoverflow.com

React redux how to change object value in reducer

  if (action.type == types.FILTER_TITLE_CHANGED) {
    let newState = { ...state };
    newState.filterTitleStr = action.filterTitleStr;
    return newState;
  } else if (action.type == types.FILTER_AUTHOR_CHANGED) {
    let newState = { ...state };
    newState.filterAuthorStr = action.filterAuthorStr;
    return newState;
  } else if (action.type == types.FILTER_CATEGORY_CHANGED) {
    let newState = { ...state };
    newState.filterCategoryStr = action.filterCategoryStr;
    return newState;
  }

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