React

by Vikram Deshmukh

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 children = ['Bob', 'Jeff', 'Kate'];
const TARGET_NODE = 'Jeff';
let jeffRef;

const setRef = (el, label) => {
	if(label === TARGET_NODE) {
		jeffRef = el;
	}
}

const SampleApp = ({children}) => (
	<ul>
  	{children.map((child, index) => {
    	return (<li key={index} ref={el => setRef(el, child)}>{child}</li>)
    })}
  </ul>
)

ReactDOM.render(<SampleApp children={children}/>, document.querySelector("#app"))

console.log(jeffRef)	//	Should output: <li>Jeff</li>