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06.extra-3.js
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06.extra-3.js
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// useEffect: HTTP requests
// 💯 store the state in an object
// http://localhost:3000/isolated/final/06.extra-3.js
import * as React from 'react'
import {
fetchPokemon,
PokemonInfoFallback,
PokemonForm,
PokemonDataView,
} from '../pokemon'
function PokemonInfo({pokemonName}) {
const [state, setState] = React.useState({
status: 'idle',
pokemon: null,
error: null,
})
const {status, pokemon, error} = state
React.useEffect(() => {
if (!pokemonName) {
return
}
setState({status: 'pending'})
fetchPokemon(pokemonName).then(
pokemon => {
setState({status: 'resolved', pokemon})
},
error => {
setState({status: 'rejected', error})
},
)
}, [pokemonName])
if (status === 'idle') {
return 'Submit a pokemon'
} else if (status === 'pending') {
return <PokemonInfoFallback name={pokemonName} />
} else if (status === 'rejected') {
return (
<div>
There was an error:{' '}
<pre style={{whiteSpace: 'normal'}}>{error.message}</pre>
</div>
)
} else if (status === 'resolved') {
return <PokemonDataView pokemon={pokemon} />
}
throw new Error('This should be impossible')
}
function App() {
const [pokemonName, setPokemonName] = React.useState('')
function handleSubmit(newPokemonName) {
setPokemonName(newPokemonName)
}
return (
<div className="pokemon-info-app">
<PokemonForm pokemonName={pokemonName} onSubmit={handleSubmit} />
<hr />
<div className="pokemon-info">
<PokemonInfo pokemonName={pokemonName} />
</div>
</div>
)
}
export default App