/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;
  }

Similar codes

0 vote193 views1 answer
React catch error in component
Javascript React
2 votes265 views1 answer
React router 6 navigate
Javascript React
1 vote181 views1 answer
React native get last element of array
Javascript React
1 vote214 views2 answers
React state not updating immediately
Javascript React
1 vote282 views1 answer
Rendering, reconciliation, committing in react
Javascript React
0 vote217 views1 answer
Use this in a react js component
Javascript React
1 vote186 views1 answer
React native flatlist horizontal scroll
Javascript React
0 vote206 views1 answer
Standalone form inside reactive form
Javascript React
2 votes211 views1 answer
Path.split is not a function react hook use form
Javascript React
0 vote192 views1 answer
TrackPromise React
Javascript React