I am developing a lottery statistics app that gets data from a csv loaded from an input then I was wanting to read this data to the redux store so I can use it across multiple components.
I have successfully saved the data to the redux store once I import the file and read it through Header.js and using an action, but I am not sure how to access this in other components like e.g. Main.js.
I feel like I am still confused on how react/redux all fits together. I'm sorry if this has been asked before but everything I looked up online I couldn't get to work.
// index.js
import React from "react";
import ReactDOM from "react-dom";
import { createStore, applyMiddleware } from "redux";
import { Provider } from "react-redux";
import thunk from "redux-thunk";
import reducers from "./reducers";
import App from "./components/App";
const store = createStore(reducers, applyMiddleware(thunk));
ReactDOM.render(
<Provider store={store}>
<App />
</Provider>,
document.querySelector("#root")
);
// App.js
import React from "react";
import Header from "./Header";
import Main from "./Main";
const App = () => {
return (
<div>
<Header />
<Main />
<div className="numbers-for-draw"></div>
</div>
);
};
export default App;
// Header.js
import React from "react";
import { CSVReader } from "react-papaparse";
import { fetchData } from "../actions";
import { connect } from "react-redux";
class Header extends React.Component {
constructor(props) {
super(props);
this.fileInput = React.createRef();
}
handleReadCSV = data => {
this.props.fetchData(data);
console.log(this.props.data);
};
handleOnError = (err, file, inputElem, reason) => {
console.log(err);
};
handleImportOffer = () => {
this.fileInput.current.click();
console.log("Got to handleImportOffer");
};
render() {
return (
<header>
<CSVReader
onFileLoaded={this.handleReadCSV}
inputRef={this.fileInput}
style={{ display: "none" }}
onError={this.handleOnError}
/>
<button onClick={this.handleImportOffer}>Import</button>
</header>
);
}
}
//Map what is in the redux store (e.g. state) to props
const mapStateToProps = state => ({
data: state.data
});
export default connect(mapStateToProps, {
fetchData: fetchData
})(Header);
// Main.js
import React from "react";
import { fetchData } from "../actions";
import { connect } from "react-redux";
const Main = () => {
console.log("In main");
console.log(this.props.data); //Blows up here.
return <div>Main</div>;
};
//Map what is in the redux store (e.g. state) to props
const mapStateToProps = state => ({
data: state.data
});
export default connect(mapStateToProps, {
fetchData: fetchData
})(Main);
// actions/index.js
export const fetchData = data => dispatch => {
console.log("Action");
const lottoData = {
stringNumbers: [
"one",
"two",
"three",
...
],
allResults: [],
winningNumbers: [],
winningNumbersAsStrings: []
};
const localData = data.data;
localData.shift();
localData.forEach(line => {
const lineObject = {
draw: line[0],
drawDate: line[1],
ballOne: line[2],
ballTwo: line[3],
ballThree: line[4],
ballFour: line[5],
ballFive: line[6],
ballSix: line[7],
bonusBall: line[8],
bonusBall2: line[9],
powerBall: line[10]
};
lottoData.allResults.push(lineObject);
let nums = [];
nums.push(parseInt(line[2]));
nums.push(parseInt(line[3]));
nums.push(parseInt(line[4]));
nums.push(parseInt(line[5]));
nums.push(parseInt(line[6]));
nums.push(parseInt(line[7]));
nums.sort((a, b) => {
if (a < b) {
return -1;
} else if (a > b) {
return 1;
} else {
return 0;
}
});
lottoData.winningNumbers.push(nums);
lottoData.winningNumbersAsStrings.push(nums.toString());
});
dispatch({ type: "FETCH_DATA", payload: lottoData });
};
// lottoReducer.js
export default (state = {}, action) => {
switch (action.type) {
case "FETCH_DATA":
return action.payload;
default:
return state;
}
};
// reducers/index.js
import { combineReducers } from "redux";
import lottoReducer from "./lottoReducer";
export default combineReducers({
data: lottoReducer
});
I haven't tested your code, but it seems to me that the only problem is in your Main.js
While you use a function component and not a class, you shouldn't use this to access your props. The following should work as expected:
const Main = (props) => {
console.log("In main");
console.log(props.data);
return <div>Main</div>;
};
//Map what is in the redux store (e.g. state) to props
const mapStateToProps = state => ({
data: state.data
});
export default connect(mapStateToProps, {
fetchData: fetchData
})(Main);
In your main.js you used functional components so this.props doesn't work there. You must pass props to your component and console.log(props.data).
Related
I am a beginner learning react and redux. I wrote this demo about how to use connect.js in redux. Searching this kind of question but there is no right answer for my code. I got a undefined context. Is it typo? or I passed context in a wrong way? Thanks in advance. Here is my code.
index.js
import React from "react";
import ReactDOM from "react-dom";
import store from "./store";
import { Provider } from "react-redux";
import App from "./App";
ReactDOM.render(
<Provider store={store}>
<App />
</Provider>,
document.getElementById("root")
);
/store/index.js
import { createStore } from "redux";
import reducer from "./reducer.js";
const store = createStore(reducer);
export default store;
/store/reducer.js
import { ADD, SUB, MUL, DIV } from './constants.js'
// or initialState
const defaultState = {
counter: 0
}
function reducer(state = defaultState, action) {
switch (action.type) {
case ADD:
return {...state, counter: state.counter + action.num};
case SUB:
return {...state, counter: state.counter - action.num};
case MUL:
return {...state, counter: state.counter * action.num};
case DIV:
return {...state, counter: state.counter / action.num};
default:
return state;
}
}
export default reducer
connect.js
import React, { PureComponent } from "react";
import { StoreContext } from "./context";
export default function connect(mapStateToProps, mapDispatchToProps) {
return function enhanceHOC(WrappedCpn) {
class EnhanceCpn extends PureComponent {
constructor(props, context) {
super(props, context);
console.log('connect props', props);
console.log('connect context', context); // context is undefined here
this.state = {
storeState: mapStateToProps(context.getState()),
};
}
componentDidMount() {
this.unSubscribe = this.context.subscribe(() => {
this.setState({
counter: mapStateToProps(this.context.getState()),
});
});
}
componentWillUnmount() {
this.unSubscribe();
}
render() {
return (
<WrappedCpn
{...this.props}
{...mapStateToProps(this.context.getState())}
{...mapDispatchToProps(this.context.dispatch)}
/>
);
}
}
EnhanceCpn.contextType = StoreContext;
return EnhanceCpn;
};
}
context.js
import React from "react";
const StoreContext = React.createContext();
export {
StoreContext
}
App.js
import React, { PureComponent } from 'react'
import My from './pages/my'
export default class App extends PureComponent {
constructor(props, context) {
super(props, context);
console.log('APP props', props);
console.log('APP context', context); // context got value
}
render() {
return (
<div>
<My />
</div>
)
}
}
my.js
import React, { PureComponent } from 'react'
import { sub, mul } from '../store/actionCreators'
import connect from '../utils/connect'
class My extends PureComponent {
render() {
return (
<div>
<h3>my</h3>
<h3>counter: { this.props.counter }</h3>
<button onClick={e => this.props.subNum()}>-2</button>
<button onClick={e => this.props.mulNUm(5)}>*5</button>
</div>
)
}
}
const mapStateToProps = state => ({
counter: state.counter
})
const mapDispatchToProps = dispatch => ({
subNum: (num = -2) => {
dispatch(sub(num))
},
mulNUm: num => {
dispatch(mul(num))
}
})
export default connect(mapStateToProps, mapDispatchToProps)(My)
actionCreators.js
import { ADD, SUB, MUL, DIV } from './constants.js'
export function add(num) {
return {
type: ADD,
num
}
}
export const sub = (num) => {
return {
type: SUB,
num
}
}
export const mul = (num) => ({
type: MUL,
num
})
export const div = num => ({
type: DIV,
num
})
constants.js
const ADD = 'ADD_ACTION'
const SUB = 'SUB_ACTION'
const MUL = 'MUL_ACTION'
const DIV = 'DIV_ACTION'
export { ADD, SUB, MUL, DIV }
From the docs, here is what it says with regards to Class.contextType:
The contextType property on a class can be assigned a Context object
created by React.createContext(). Using this property lets you
consume the nearest current value of that Context type using
this.context. You can reference this in any of the lifecycle methods
including the render function.
It seems that in your case, you are just missing passing your custom StoreContext to redux Provider with the context props
You need to do something like:
import React from "react";
import ReactDOM from "react-dom";
import store from "./store";
import { StoreContext } from "./context";
import { Provider } from "react-redux";
import App from "./App";
ReactDOM.render(
<Provider store={store} context={StoreContext}>
<App />
</Provider>,
document.getElementById("root")
);
See also https://react-redux.js.org/using-react-redux/accessing-store#providing-custom-context
I got the same issue and solved by creating store on the same file as the root component where Provider is applied. Example code below:
<Provider store={createStore(reducers)}>
<App />
</Provider>
Cannot read properties of undefined (reading 'getState')
Solution:
(1) make a file store.js in your redux folder and you can copy the code
import { createStore, applyMiddleware } from "redux";
import logger from 'redux-logger';
import rootReducer from "./root-reducer";
const middlewares = [logger];
const store = createStore(rootReducer, applyMiddleware(...middlewares));
export default store;
(2) then just import the file in index.js file
<Provider store={store}>
<BrowserRouter>
<App />
</BrowserRouter>
</Provider>
i got same issues
i just have to change were i have my configure store from this
import { configureStore } from "#reduxjs/toolkit";
import basketReducer from "../slices/basketSlice";
export const store = configureStore({
reducer: {
basket: basketReducer,
},
});
to this
import { configureStore } from "#reduxjs/toolkit";
import basketReducer from "../slices/basketSlice";
export default configureStore({
reducer: {
basket: basketReducer,
},
});
and this method works for me
i also find out when i play around with the code to understand why it happen and see if i broke it what will happen this is my finding and observation from it
note concerning redux
if you used the below as import in your _app.js
import { store } from "../stores/store";
then
the global store should be rewritten like this
export const store = configureStore({
reducer: {
basket: basketReducer,
},
});
but if you import it like this with out distructuring it[store] or without the curly bracket
import store from "../stores/store";
then
you should write the store like this
export default configureStore({
reducer: {
basket: basketReducer,
},
});
Both ways works for me
I am simply trying to connect() my LoginPage (component) to my Redux Store and dispatch in action via a onClick (event). When I console.log(this.props) my dispatch handler login() isn't in the component's props.
GitHub Repo -- https://github.com/jdavis-software/demo.git
Question: Why isn't my Redux Store either connection or dispatching the actions?
LoginPage:
import React, { Component} from 'react';
import { connect } from 'react-redux';
export class LoginPage extends Component<any> {
render(){
console.log('props doesnt have contain - login(): ', this.props)
return (<button onClick={ () => '' }>Login</button>)
}
}
const mapProps = state => ({ user: state.user })
const dispatchProps = (dispatch) => {
return {
login: () => dispatch({ type: 'USER_LOGGED_IN', payload: true})
}
}
export default connect(mapProps,dispatchProps)(LoginPage)
Redux Configuration:
import { IStore, IUser } from '#interfaces';
import { createStore, combineReducers } from 'redux';
import ReduxPromise from 'redux-promise';
// reducers
import userReducer from './user.reducer';
// define the intial global store state
const initialState:IStore = {
user: {
isAuthenticated: false
}
}
const appReducer = combineReducers({user: userReducer})
export default createStore(appReducer,initialState);
User Reducer:
// initial state
const initalState:IUser = {
isAuthenticated: false
}
// reducer
const userReducer = (state:IUser = initalState, { type, payload}: IPayload): IUser => {
console.log('user reducer start', state)
switch (type) {
case 'USER_LOGGED_IN':
state = { ...state, isAuthenticated: payload }
break;
default:
return state;
}
return state;
};
export default userReducer;
Root Page:
import React from 'react';
import { render } from 'react-dom';
import { Provider } from 'react-redux';
// styles
import './index.scss';
// pages
import { App } from '#pages';
// store
import store from './core/store/store';
render(
<Provider store={store}>
<App/>
</Provider>, document.getElementById('app')
);
I checked your code on git repository. I found out that you're exporting the named export
export class LoginPage
and the default export,
export default connect(mapProps,dispatchProps)(LoginPage)
But when you're accessing it, you're accessing it as
import { /*Other components*/ , LoginPage } from '#pages'
So it is actually taking the named exported component which is not connected to store.
I suggest you to import as
import LoginPage , { /*Other components*/ } from '#pages'
This might solve your problem.
Return statements are missing in the properties of connect.
const mapProps = state => { return {user: state.user} }
const dispatchProps = (dispatch) => {
return {
login: () => dispatch({ type: 'USER_LOGGED_IN', payload: true})
}
}
export default connect(mapProps,dispatchProps)(LoginPage)
Updated:
Please check Redux-dispatch
try:
import React, { Component} from 'react';
import { connect } from 'react-redux';
export class LoginPage extends Component<any> {
render(){
console.log('props doesnt contain - login(): ', this.props)
return (
<button onClick={ this.props.login }>Login</button>
)
}
}
const mapProps = state => ({ user: state.user })
const dispatchProps = (dispatch) => ({
login: () => dispatch({ type: 'USER_LOGGED_IN', payload: true})
})
export default connect(mapProps,dispatchProps)(LoginPage)
to return an object with Arrow Functions you need to wrap your {} with ()
I am new to React and building a Spotify App with their API. I am using Redux Promise to resolve all promises. I can see data when I console it in my reducer of the data. But when I check my console it shows mapDispatchToProps() in Connect(App) must return a plain object. Instead received [object Promise]. I am thinking is it because I'm using Redux Promise vs thunk, but shouldn't it be able to resolve them as well?
Reducer
import { NEW_RELEASES } from '../actions/types';
export default function(state = [] , action){
console.log(action)
switch(action.type){
case NEW_RELEASES:
return [ action.payload.data, ...state ];
}
return state
}
Store
import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import { createStore, applyMiddleware } from 'redux';
import App from './App';
import reducers from './reducers';
import ReduxPromise from 'redux-promise'; // Look at action creator for ReduxPromise use
const createStoreWithMiddleware = applyMiddleware(ReduxPromise)(createStore);
ReactDOM.render(
<Provider store={createStoreWithMiddleware(reducers)}>
<App />
</Provider>
, document.querySelector('#root'));
Action Creator
export const getNewReleases = () => {
console.log('ran')
let request = axios.get("https://api.spotify.com/v1/browse/new-releases?country=SE", {
headers: {
'Authorization': 'Bearer ' + accessToken
}
})
return{
type: NEW_RELEASES,
payload: request
}
App.Js
import React, { Component } from 'react';
import './App.css';
import Spotify from 'spotify-web-api-js';
import { getNewReleases } from './actions'
import { bindActionCreators } from 'redux';
import { connect } from 'react-redux';
const spotifyWebApi = new Spotify();
class App extends Component {
constructor(props) {
super(props)
const params = this.getHashParams();
this.state = {
welcome: "Welcome to SpotiDate",
accessToken: params.access_token,
loggedIn: params.access_Token ? true : false,
nowPlaying: {
name: 'Not Checked',
images: ''
}
}
if (params.access_token) {
spotifyWebApi.setAccessToken(params.access_token);
}
}
getHashParams() {
var hashParams = {};
var e, r = /([^&;=]+)=?([^&;]*)/g,
q = window.location.hash.substring(1);
while (e = r.exec(q)) {
hashParams[e[1]] = decodeURIComponent(e[2]);
}
return hashParams;
}
componentWillMount() {
spotifyWebApi.setAccessToken(this.state.accessToken)
localStorage.setItem('accessToken', this.state.accessToken);
const storedToken = localStorage.getItem('accessToken');
getNewReleases(storedToken);
}
render() {
return (
<div className="App">
<h3>{this.state.welcome}</h3>
<div>
<img src={this.state.nowPlaying.image} />
</div>
<button onClick={() => getNewReleases()}>Get New Releases</button>
<div className="new-releases">
</div>
</div>
);
}
}
const mapStateToProps = (state) => {
return{
newReleases: state.newReleases
}
}
const mapDispatchToProps = (dispatch) => {
return bindActionCreators(getNewReleases, dispatch);
}
export default connect(mapStateToProps, mapDispatchToProps)(App);
the function bindActionCreators will take 1st argument as JSON. so it should be like below.
const mapDispatchToProps = dispatch => {
return bindActionCreators(
{
getNewReleases: getNewReleases
},
dispatch
);
};
try to use Object.assign({}, state.newReleases), or you can use the spread operator like assigning the code just like return {...state,state.newReleases}
since your object is unable to be mapped to the object state
For further understanding of this, please check this link git issue - 334
Try returning you actions in mapDispatchToProps like this:
const mapDispatchToProps = (dispatch) => ({
getNewReleases: () => dispatch(getNewReleases())
})
Why am I getting TypeError: notes.map is not a function in the following part of my Notes component? {notes.map((note) => (
components/Notes.js
import React, { Component } from "react"
import { connect } from "react-redux"
const mapStateToProps = (state) => {
return { notes: state.notes }
}
const NotesList = ({ notes }) => (
<ul className="notes_list">
{notes.map((note) => (
<li className="note_body" key={note.id}>
<div dangerouslySetInnerHTML={{ __html: note.body }}></div>
</li>
))}
</ul>
)
const Notes = connect(mapStateToProps)(NotesList);
export default Notes;
reducers/notes.js
import * as types from '../actions/actionTypes'
const initialState = {
notes: [{id: 1, body: "hey"}]
}
function notes(state = initialState, action) {
switch (action.type) {
...
default:
return state
}
}
export default notes
root reducer
import { combineReducers } from 'redux'
import notes from './notes'
import noteForm from './noteForm'
const rootReducer = combineReducers({
notes,
noteForm
})
export default rootReducer
app.js
import React, { Component } from 'react';
import Notes from './components/Notes'
import NoteForm from './components/NoteForm'
const App = () => (
<div className="App">
<NoteForm />
<Notes />
</div>
)
export default App
---upd
store
import { createStore, applyMiddleware } from 'redux'
import rootReducer from '../reducers'
import {ping} from './enhancers/ping'
import thunk from 'redux-thunk'
export default function configureStore(initialState) {
const store = createStore(rootReducer, initialState, applyMiddleware(thunk, ping))
return store
}
index.js
...
import configureStore from './store/configureStore'
const store = configureStore()
ReactDOM.render(
<Provider store={store}>
<App />
</Provider>,
document.getElementById('root'));
Are you providing the connect function with a store? If so, everything looks fine to me -- it'd be useful to see your store initialization code.
Create a store with createStore from redux and wrap your App with a Provider from react-redux:
app.js
...
import notesReducer from './reducers/notes'
import { createStore } from 'redux'
const store = createStore(notesReducer) // use combineReducers when you add a 2nd reducer
const App = () => (
<Provider store={store}>
<div className="App">
<NoteForm />
<Notes />
</div>
</Provider>
)
If you already have a Provider somewhere else, check if everything's okay there.
Here's my fully working example - I copied your Notes.js file and wrote up the following App.js - no errors whatsoever (I bundled store creation and reducers all in one file for simplicity):
import React, { Component } from 'react';
import { Provider } from 'react-redux'
import { createStore } from 'redux'
import Notes from './Notes'
const initialState = {
notes: [{
id: 1,
body: 'testing'
}]
}
function notes(state = initialState, action) {
switch (action.type) {
default:
return state
}
}
const store = createStore(notes)
export default () => (
<Provider store={store}>
<Notes />
</Provider>
)
Update for combineReducers
When using combineReducers, your reducers' initialState will already be namespaced in the store under the key which was used in the combineReducers call. Change your notes reducer's initialState to an array:
import * as types from '../actions/actionTypes'
// no need for { notes: [] } here, combineReducers({ notes }) will take care of that
const initialState = [{ id: 1, body: 'hey' }]
function notes(state = initialState, action) {
switch (action.type) {
...
default:
return state
}
}
export default notes
When you get map isn't a function that means you're not calling the data correctly.
I see in notes reducer page you're not calling the states correctly
function notes(state = initialState, action) {
switch (action.type) {
...
default:
return state
}
}
Change it to:
function notes(state = initialState.notes, action) {
switch (action.type) {
...
default:
return state
}
}
The regular way to do this is to not putting your states in an array
const initialState = {
id: 1,
body: "hey"
}
function notes(state = initialState, action) {
switch (action.type) {
...
default:
return state
}
}
This will works fine
since my root reducer has the following structure
const rootReducer = combineReducers({
notes
})
I can reach notes by state.notes.notes
const mapStateToProps = (state) => {
return { notes: state.notes.notes }
}
having the following initial state structure for notes
const initialState = {
notes: []
}
Tried to look through similar questions, but didn't find similar issues.
I am trying to implement sorts by name and amount in my app, this event is triggered in this component:
import React, { Component } from 'react';
import { connect } from 'react-redux';
import { sortByExpenseName, sortByExpenseAmount } from '../actions/expensesFilters';
class ExpensesListFilter extends Component {
onSortByExpenseName = () => {
this.props.sortByExpenseName();
};
onSortByExpenseAmount = () => {
this.props.sortByExpenseAmount();
}
render() {
return (
<div>
<span>Expense Name</span>
<button onClick={this.onSortByExpenseName}>Sort me by name</button>
<button onClick={this.onSortByExpenseAmount}>Sort me by amount</button>
</div>
)
}
}
const mapDispatchToProps = (dispatch) => ({
sortByExpenseName: () => dispatch(sortByExpenseName()),
sortByExpenseAmount: () => dispatch(sortByExpenseAmount()),
});
export default connect(null, mapDispatchToProps)(ExpensesListFilter);
for that I am using following selector:
export default (expenses, { sortBy }) => {
return expenses.sort((a, b) => {
if (sortBy === 'name') {
return a.name < b.name ? 1 : -1;
} else if (sortBy === 'amount') {
return parseInt(a.amount, 10) < parseInt(b.amount, 10) ? 1 : -1;
}
});
};
I run this selector in mapStateToProps function for my ExpensesList component here:
import React from 'react';
import { connect } from 'react-redux';
import ExpensesItem from './ExpensesItem';
// my selector
import sortExpenses from '../selectors/sortExpenses';
const ExpensesList = props => (
<div className="content-container">
{props.expenses && props.expenses.map((expense) => {
return <ExpensesItem key={expense.id} {...expense} />;
}) }
</div>
);
// Here I run my selector to sort expenses
const mapStateToProps = (state) => {
return {
expenses: sortExpenses(state.expensesData.expenses, state.expensesFilters),
};
};
export default connect(mapStateToProps)(ExpensesList);
This selector updates my filter reducer, which causes my app state to update:
import { SORT_BY_EXPENSE_NAME, SORT_BY_EXPENSE_AMOUNT } from '../actions/types';
const INITIAL_EXPENSE_FILTER_STATE = {
sortBy: 'name',
};
export default (state = INITIAL_EXPENSE_FILTER_STATE, action) => {
switch (action.type) {
case SORT_BY_EXPENSE_NAME:
return {
...state,
sortBy: 'name',
};
case SORT_BY_EXPENSE_AMOUNT:
return {
...state,
sortBy: 'amount',
};
default:
return state;
}
};
Sort event causes my state to update, the expenses array in my expenses reducer below is updated and sorted by selector, BUT the ExpensesList component doesn't re-render after my expenses array in state is updated.
What I want my ExpensesList component to do, is to re-render with sorted expenses array and sort ExpensesItem components in list.
What could be the reason why it fails? Pretty sure I am missing out something essential, but can't figure out what. My expenses reducer:
import { FETCH_EXPENSES } from '../actions/types';
const INITIAL_STATE = {};
export default (state = INITIAL_STATE, action) => {
switch (action.type) {
case FETCH_EXPENSES:
return {
...state,
expenses: action.expenses.data,
};
default:
return state;
}
};
All these components are childs to this parent component:
import React from 'react';
import ExpensesListFilter from './ExpensesListFilter';
import ExpensesList from './ExpensesList';
const MainPage = () => (
<div className="box-layout">
<div className="box-layout__box">
<ExpensesListFilter />
<ExpensesList />
</div>
</div>
);
export default MainPage;
App.js file (where I run startExpenseFetch)
import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import 'normalize.css/normalize.css';
import AppRouter, { history } from './routers/AppRouter';
import configureStore from './store/configureStore';
import LoadingPage from './components/LoadingPage';
import { startExpenseFetch } from './actions/expensesData';
import './styles/styles.scss';
const store = configureStore();
const jsx = (
<Provider store={store}>
<AppRouter />
</Provider>
);
let hasRendered = false;
const renderApp = () => {
if (!hasRendered) {
ReactDOM.render(jsx, document.getElementById('app'));
hasRendered = true;
}
};
store.dispatch(startExpenseFetch()).then(() => {
renderApp();
});
ReactDOM.render(<LoadingPage />, document.getElementById('app'));
Rest of files:
ExpenseItem Component:
import React from 'react';
const ExpenseItem = ({ amount, name }) => (
<div>
<span>{name}</span>
<span>{amount}</span>
</div>
);
export default ExpenseItem;
Action creators:
expensesData.js
import axios from 'axios';
import { FETCH_EXPENSE } from './types';
// no errors here
const ROOT_URL = '';
export const fetchExpenseData = expenses => ({
type: FETCH_EXPENSE,
expenses,
});
export const startExpenseFetch = () => {
return (dispatch) => {
return axios({
method: 'get',
url: `${ROOT_URL}`,
})
.then((response) => {
dispatch(fetchExpenseData(response));
console.log(response);
})
.catch((error) => {
console.log(error);
});
};
};
expensesFilters.js
import { SORT_BY_EXPENSE_NAME, SORT_BY_EXPENSE_AMOUNT } from './types';
export const sortByExpenseName = () => ({
type: SORT_BY_EXPENSE_NAME,
});
export const sortByExpenseAmount = () => ({
type: SORT_BY_EXPENSE_AMOUNT,
});
configureStores.js file
import { createStore, combineReducers, applyMiddleware, compose } from 'redux';
import thunk from 'redux-thunk';
import expensesDataReducer from '../reducers/expensesData';
import expensesFilterReducer from '../reducers/expensesFilters';
const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;
export default () => {
const store = createStore(
combineReducers({
expensesData: expensesDataReducer,
expensesFilters: expensesFilterReducer,
}),
composeEnhancers(applyMiddleware(thunk))
);
return store;
};
AppRouter.js file
import React from 'react';
import { Router, Route, Switch, Link, NavLink } from 'react-router-dom';
import createHistory from 'history/createBrowserHistory';
import MainPage from '../components/MainPage';
import NotFoundPage from '../components/NotFoundPage';
export const history = createHistory();
const AppRouter = () => (
<Router history={history}>
<div>
<Switch>
<Route path="/" component={MainPage} exact={true} />
<Route component={NotFoundPage} />
</Switch>
</div>
</Router>
);
export default AppRouter;
Don't you have a typo on your call to your selector? :)
// Here I run my selector to sort expenses
const mapStateToProps = (state) => {
return {
expenses: sortExpenses(state.expensesData.expenses, state.expnsesFilters),
};
};
state.expnsesFilters look like it should be state.expensesFilters
Which is one of the reasons you should make your sortExpenses selector grab itself the parts of the state it needs and do it's job on its own. You could test it isolation and avoid mistakes like this.
I found a reason why it happens, in my selector I was mutating my app's state. I wasn't returning a new array from it, and was changing the old one instead, that didn't trigger my vue layer to re-render. Fixed it and it works now.