React

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

const DataContext = React.createContext([]);

const SomeComponent = ({ data }) => <ul>
    {data.map(item => <li key={item.text}>{item.text}</li>)}
  </ul>;

const dataWrapper = (WrappedComponent) => (props) => 
  <DataContext.Consumer>
    {data => <WrappedComponent data={data} {...props}/>}
  </DataContext.Consumer>;

const WrappedComponent = dataWrapper(SomeComponent);

class TodoApp extends React.Component {
  constructor(props) {
    super(props)
    this.state = {
    	items: [
      	{ text: "Learn JavaScript", done: false },
        { text: "Learn React", done: false },
        { text: "Play around in JSFiddle", done: true },
        { text: "Build something awesome", done: true }
      ]
    }
  }
  
  render() {
    return (
      <DataContext.Provider value={this.state.items}>
        <WrappedComponent/>
      </DataContext.Provider>
    )
  }
}

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