/
App.js
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/
App.js
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import React, {useState, useEffect, useContext} from 'react';
import './App.css';
const fakeRes1 = [{title: 'Result 1', body: 'Long Description', more: 'abc'}]
const fakeRes2 = [{title: 'Result 1', body: 'Description D', more: 'def'}, {title: 'Result 2', body: 'Description E'}]
export const RouterContext = React.createContext()
const getHash = () => window.decodeURI(window.location.hash.substr(1))
const Result = ({title, body, more}) => {
const {route, setRoute} = useContext(RouterContext)
const handleClick = (e) => {
e.preventDefault()
setRoute(`${route} ${more}`)
}
return (
<div>
<h1>{title}
</h1>
{body}
{more && <div><button onClick={handleClick}>See more</button></div>}
</div>
)
}
const Search = ({query, submittedQuery, results, onChange, onSubmit}) => (
<div>
<form onSubmit={onSubmit}>
Search: <input value={query} onChange={onChange}/>
<button>Go</button>
</form>
{submittedQuery && (
<div>
Results for {submittedQuery}: {results.map(result => <Result {...result} key={result.title}/>)}
</div>
)}
</div>
)
const App = () => {
const [route, setRoute] = useState(getHash())
const [query, setQuery] = useState('')
const [results, setResults] = useState([])
useEffect(() => {
setQuery(route)
window.location.hash = route
const timeout = setTimeout(() => setResults(Math.random() < 0.5 ? fakeRes1 : fakeRes2), 500)
return () => clearTimeout(timeout)
}, [route])
useEffect(() => {
window.onhashchange = () => setRoute(getHash())
return () => window.onhashchange = undefined
}, [])
const handleChange = (e) => {
setQuery(e.target.value)
}
const handleSubmit = (e) => {
e.preventDefault()
setRoute(query)
}
return (
<div className="App">
<RouterContext.Provider value={{route, setRoute}}>
<header className="App-header">
logo, navigation, ... {results.length ? `Showing ${results.length} results` : null}
</header>
<Search {...{query, results}}
submittedQuery={route}
onChange={handleChange}
onSubmit={handleSubmit}/>
<footer>
MIT License
{route &&
<div>More info about <a href={`https://google.com?q=${route}`}>{route}</a>.</div>
}
</footer>
</RouterContext.Provider>
</div>
);
}
export default App;