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Contador Redux
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import React from 'react'; | |
import logo from './logo.svg'; | |
import './App.css'; | |
import { Provider, useSelector, useDispatch } from 'react-redux' | |
import { createStore } from 'redux' | |
const rootReducer = (state = {count: 0}, action) => { | |
switch(action.type) { | |
case 'INCREMENTAR_CONTADOR': | |
return { ...state, count: state.count + 1} | |
case 'DECREMENTAR_CONTADOR': | |
return { ...state, count: state.count - 1} | |
case 'RESETEAR_CONTADOR': | |
return { ...state, count: 0 } | |
default: | |
return state | |
} | |
} | |
const store = createStore(rootReducer) | |
function Contador() { | |
// trae al propiedad `count` del store | |
const count = useSelector(state => state.count) | |
// define el despachador | |
const dispatch = useDispatch() | |
// definir mis acciones | |
const incrementarContador = { type: "INCREMENTAR_CONTADOR" } | |
const decrementarContador = { type: "DECREMENTAR_CONTADOR" } | |
const resetearContador = { type: "RESETEAR_CONTADOR", value: 0 } | |
return <div> | |
<h2>Contador: {count}</h2> | |
<button onClick={()=>dispatch(incrementarContador)}>Incrementar</button> | |
<button onClick={()=>dispatch(decrementarContador)}>Decrementar</button> | |
<button onClick={()=>dispatch(resetearContador)}>Reset</button> | |
</div> | |
} | |
function App() { | |
return ( | |
<Provider store={store}> | |
<div className="App"> | |
<h1>Contador Redux</h1> | |
<Contador /> | |
</div> | |
</Provider> | |
); | |
} | |
export default App; |
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