xgqfrms·Follow1 min read·Oct 8, 2017--ListenShare```jsx// badconst ListItems = () => ([ <li>One</li> <li>Two</li> <li>Three</li>]);``````jsx// goodconst ListItems = () => ([ <li key=”uid001">One</li>, <li key=”uid002">Two</li>, <li key=”uid003">Three</li>,]);```