logo
down
shadow

Prepend to nameless array in Redux reducer


Prepend to nameless array in Redux reducer

By : Areeb
Date : November 18 2020, 03:01 PM
This might help you The state of the articleData reducer is an array. In the ARTICLE_POST_NEW_ARTICLE_SUCCESS action handler, you create a new state, which is an object, with an arr property - {arr:[action.articleData, ...state]}.
Instead return a new array with the new articleData, and spread the state into it:
code :
    case 'ARTICLE_POST_NEW_ARTICLE_SUCCESS':
        return [action.articleData, ...state] 
export function articleData(state = [], action) {


Share : facebook icon twitter icon
How can I use redux persist for only one reducer not for navigation reducer in my react native application?

How can I use redux persist for only one reducer not for navigation reducer in my react native application?


By : jkreuzig
Date : March 29 2020, 07:55 AM
this will help redux-persist v5
Set the blacklist/whitelist in the PersistConfig, and use it in persistCombineReducers (the 1st param):
code :
const persistConfig = {
  key: 'root',
  blacklist: ['navigation'],
  storage,
}

const reducer = persistCombineReducers(persistConfig , reducers)
persistStore(store, { blacklist: ['navigation'] })
Redux reducer add new object to array

Redux reducer add new object to array


By : Digvijay Thakur
Date : March 29 2020, 07:55 AM
will be helpful for those in need I'm having a problem adding new object to array of objects through dispatching action after submit. The purpose of this is showing flash messages across site. I have two components that are responsible for showing messages, FlashMessagesList and FlashMessage. Also server respond with message object, that needs to bee added to messages array. The problem is when action is dispatched, I can see that it is dispatched in redux devtools, but state never changed no meter what i do, it remains empty array, and I'm quite stuck with this, so any advice will be welcome. Here is the relevant code: , There's a typo in your reducer. Instead of
code :
switch (action.types) {
switch (action.type) {
Redux dev tool state chart shows that reducer is updating another reducer

Redux dev tool state chart shows that reducer is updating another reducer


By : Travista
Date : March 29 2020, 07:55 AM
Any of those help All reducers get called when you dispatch any action, that is by design.
ACTION didn't attach to reducer despite state of reducer in react-redux

ACTION didn't attach to reducer despite state of reducer in react-redux


By : Saurabh Mehra
Date : March 29 2020, 07:55 AM
it should still fix some issue You need to have your action creators return functions that perform the asynchronous requests, right now your action creators only return objects, we can return functions using redux-thunk middleware
Then you would write your action creators that make api calls like this
code :
export const fetchThreadData = id => dispatch => {
  dispatch({
    type: FETCH_THREADS_REQUESTING,
    isLoading: true
  });

  const request = axios({
    method: "GET",
    url: "SOME API ADDRESS"
  });

  return request.then(
    response =>
      dispatch({
        type: FETCH_THREADS_SUCCESSFUL,
        payload: response.data,
        isLoading: false
      }),
    error =>
      dispatch({
        type: FETCH_THREADS_FAILED,
        payload: error || "Failed to fetch thread",
        isLoading: false
      })
  );
};
How to update a value in 2D array in redux reducer?

How to update a value in 2D array in redux reducer?


By : fabio dias
Date : March 29 2020, 07:55 AM
This might help you I am trying to update a value at index (i, j) in a 2D array using spread operator in redux reducer. My reducer looks like: , Or without map at all, and just with spread operator and dynamic key:
code :
let arr = [
  [1, 2, 5],
  [5, 8, 9],
  [2, 6, 9]
];

const newValue = 6;
const i = 1;
const j = 2;

let myArr = Object.assign([...arr], {
  [i]: Object.assign([...arr[i]], {
    [j]: newValue
  })
})

console.log(myArr);
Related Posts Related Posts :
  • Parse php json to javascript
  • Write to Internet Explorer javascript console with vba in excel
  • 2 Forms with Jquery
  • Why the loop stops right in the middle?
  • filter system for restaurant booking
  • how to add active class in framework nav menu when (add/edit) pages are opened
  • Port a js map in dart
  • How to get value from select using javascript
  • Audio won't be muted with JavaScript - removing audio tags with mutationobserver needed
  • How to include an HTML/Javascript game into reactJS website
  • Convert Nodejs server into node module
  • Strage Vue behaviour. V-if does not watch properly
  • Is it possible to use map/filter/reduce inside a promise by returning the result with Promise.resolve?
  • Does EcmaScript have any rule where whitespace is important for the compiler during parsing
  • How is DOM and Virtual DOM represented in memory?
  • cannot display text onchange select option
  • My gulpfile can edit (change) and delete file, but dont copy new (add) files
  • How do I reset scroll position of paper-dialog-scrollable?
  • Loading unlooped gif-animation several times
  • Strange error from Google API: initializeAutocomplete is not a function
  • Array state variable is not being set during componentWillMount
  • Stop refresh on form submit when using javascript
  • Npm WARN deprecated babel-preset-es2015@6.24.1: Thanks for using Babel: we recommend using babel-preset-env now: please
  • Cant get wheel scroll delta on Firefox
  • Puppeteer with Prompt, ignoring rest of function
  • VueJS Form Input Binding
  • How To Extend mail.Chatter Widget in Javascript Odoo 10
  • How Chk two checkboxes at a time using jQuery
  • Broken "if" statement in JavaScript code…
  • Trying to create a display/hide toggle content using jQuery?
  • How to transition perspective-origin specifically?
  • Why does my nested for loop for creatDocumentFragment run the outside for loop only once?
  • How to prevent our URL from Cross-site scripting (XSS)?
  • Add change text on click with existing onclick button in jquery
  • How do I replace a <li> element in HTML with something different using jQuery?
  • How does Facebook update likes withot refresh?
  • Do mobile browsers support 4k video using HTML5 video tag?
  • Node.js pass variable/object from one module and return it
  • How do I access arrays on the asm.js heap from Javascript code, when the array's type is not Uint8?
  • How to modify fullcalendar columnFormat with bracket?
  • Nodejs How To Iterate With a Promise
  • React: setState is not defined, I already tried binding this
  • How to get text of form child when an input element is clicked on
  • How to avoid using setTimeout to wait for Promises to resolve?
  • jQuery - Check checkbox and disable other if has different value
  • Can't use fnReloadAjax datatable
  • Unfamiliar use of square brackets during multiple variable declaration in Javascript
  • How do I assign my .reduce function output to a variable?
  • Populate items from an array into different options tag
  • Javascript Regular Expressions Email Address
  • How to have multiple Flatlists with filtered data in React Native
  • Scroll to Top of Document After Param Change in Angular 4?
  • Sweetalert2 Ajax - post input data
  • Can I build a split slider using slick?
  • How can I customize a permission request popup for push notifications in a browser?
  • Find array in another array and get index of result
  • Service worker promise.then is not defined
  • how to keep validation off if some section of forms not showing during form-filling in jquery
  • Store string values to array inside a loop
  • How can I search through this JS object?
  • shadow
    Privacy Policy - Terms - Contact Us © voile276.org