<!DOCTYPE html>
<html>
<body>
<div id="root"></div>
</body>
<script src="https://unpkg.com/react@17.0.2/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@17.0.2/umd/react-dom.development.js"></script>
<script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
<script type="text/babel">
function App() {
const [amount, setAmount] = React.useState(0);
const [flipped, setFlipped] = React.useState(false);
const onChange = (event) => {
setAmount(event.target.value);
};
const reset = () => setAmount(0);
const onFlip = () => {
reset();
setFlipped((current) => !current)
};
return(
<div>
<h1>Super Converter</h1>
<div>
<label htmlFor="minutes">Minutes</label>
<input value={flipped ? amount*60 : amount}
id="minutes" placeholder="Minutes" type="number"
onChange={onChange} disabled={flipped}
/>
</div>
<div>
<label htmlFor="hours">Hours</label>
<input value={flipped ? amount : Math.round(amount/60)}
id="hours" placeholder="Hours" type="number"
disabled={!flipped} onChange={onChange}/>
</div>
<button onClick={reset}>Reset</button>
<button onClick={onFlip}>Flip</button>
</div>
);
}
const root = document.getElementById("root");
ReactDOM.render(<App />,root);
</script>
</html>분 -> 시간계산
플립버튼이용
플립온클릭시 리셋작업
시간 -> 분계산 삼항연산자
disabled = 사라지다 / enabled = 나타내다
파이팅