memo) React
<!DOCTYPE html>
<html lang="en">
<body>
<div id="root"></div>
</body>
<script src="https://unpkg.com/react@17.0.2/umd/react.production.min.js"></script>
<script src="https://unpkg.com/react-dom@17.0.2/umd/react-dom.production.min.js"></script>
<script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
<script type="text/babel">
function App() {
const [minutes, setMinutes] = React.useState(0); // default 값: 0
const onChange = (event) => {
setMinutes(event.target.value);
};
const reset = () => setMinutes(0);
return (
<div>
<h1 className="hi">Super Converter</h1>
<div>
<label htmlFor="minutes">Minutes</label>
<input
value={minutes}
id="minutes"
placeholder="Minutes"
type="number"
onChange = {onChange}
/>
</div>
<div>
<label htmlFor="hours">Hours</label>
<input value={Math.round(minutes / 60)} id="hours" placeholder="Hours" type="number"/>
</div>
<button onClick={reset}>Reset</button>
</div>
);
}
const root = document.getElementById("root");
ReactDOM.render(<App />, root);
</script>
</html>
console.log("불꽃남자 정대만"); 🏀❤