Render fragments with React 16

Have you ever wanted the ability to render two components without having to wrap them in a parent using React? React v16.0.0 introduced fragments and to further enhance fragments, as of v16.2.0, you can now use React.Fragment, or the shorthand syntax <></>, to render components without a parent element. Take the following example where I want to display a button if the user is not logged in or a friendly message if they are logged in:

function Example(props) {  
  const loginButton = props.loggedIn ? 'Hello User!' : <button>Login!</button>
  return (
      <h1>Welcome</h1>
      {loginButton}
   );
}

Trying to render the above component will result in an error. Ultimately what you needed to do is wrap your H1 and loginButton in a div (or some other element). With React 16.2.0+ we can now wrap our components in a React Fragment and the rendered markup will only contain the markup for those children:

Let's take the code above and use the new React.Fragment component:

function Example(props) {  
  const loginButton = props.loggedIn ? 'Hello User!' : <button>Login!</button>
  return (
    <React.Fragment>
      <h1>Welcome</h1>
      <button>Login!</button>
    </React.Fragment>
   );
}

Now the HTML structure doesn't have any additional container elements:

  <h1>Welcome</h1>
  <button>Login!</button>

If you want to use the shorthand syntax just remove React.Fragment from the code:

...
  return (
    <>
      <h1>Welcome</h1>
      <button>Login!</button>
    </>
   );
...

React documentation states that "...many tools don’t support it (<></>) yet so you might want to explicitly write <React.Fragment> until the tooling catches up."

For more details about fragments (including keyed fragments) check out the React Documentation on Fragments.

CodePen of the above example available here.

Happy Coding!