React - KeyPress

by Fulvio Cezar Canducci Dias

HTML

<div id="app"></div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

.done {
  color: rgba(0, 0, 0, 0.3);
  text-decoration: line-through;
}

input {
  margin-right: 5px;
}

React

function App() { 
  const [value, setValue] = React.useState('');
  const [keys, setKeys] = React.useState([]);
  function handleKeyPress (e) {
  	const {key} = e;
    setKeys([...keys, key]);
  }
 	return (
  	<div>
  	  <div>
  	    <input 
          type="text" 
          value={value} 
          onChange={e => setValue(e.target.value)}
          onKeyPress={handleKeyPress}
          autoFocus={true}
        />
  	  </div>
      <div>
        <ul>
          {keys.map((key, i) => <li key={i}>{key}</li>)}
        </ul>
      </div>
    </div>
  ) 
}

ReactDOM.render(<App />, document.querySelector("#app"))