React

by Abdul Ahmad

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 TodoApp() {
	const { data, error, loading } = useCustomHook();

  return (
    <div>

    </div>
  );
}

function useCustomHook() {
	const [data, setData] = React.useState('');
	const [error, setError] = React.useState('');
  const [loading, setLoading] = React.useState(false);
  
  console.log('data', data);
  console.log('error', error);
  console.log('loading', loading);
  
	React.useEffect(() => {
		async function getData() {
			try {
				setLoading(true);
				let data = await getAsyncData();
				if (!data || data.length < 1) data = undefined;
        setLoading(false);
				setData(data);
			} catch (e) {
				setLoading(false);
        setError(e);
			}
		}
		getData();
	});

	return { data, loading, error };
}

function getAsyncData() {
	return Promise.reject('async data');
}

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