/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

13 votes235 views4 answers
React native android build apk
Javascript React
0 vote230 views1 answer
Eslint version check in react
Javascript React
0 vote277 views1 answer
How to get the data from clicking on notification on web in reactjs
Javascript React
10 votes301 views2 answers
Failed to compile ./src/App.js Module not found: Can't resolve 'react-router-dom
Javascript React
0 vote287 views1 answer
React Native Expo Scrollview Scroll to bottom
Javascript React
5 votes247 views2 answers
React onclick new tab
Javascript React
0 vote273 views1 answer
Text and icon on same line react native
Javascript React
14 votes270 views2 answers
Adding border in react native
Javascript React
0 vote276 views1 answer
React native geocoding
Javascript React
0 vote293 views1 answer
My vscode does not recognize react code syntax
Javascript React