jsx conditional formatting code example

Example 1: conditional rendering react

function Mailbox(props) {
  const unreadMessages = props.unreadMessages;
  return (
    <div>
      <h1>Hello!</h1>
      {unreadMessages.length > 0 &&        <h2>          You have {unreadMessages.length} unread messages.        </h2>      }    </div>
  );
}

const messages = ['React', 'Re: React', 'Re:Re: React'];
ReactDOM.render(
  <Mailbox unreadMessages={messages} />,
  document.getElementById('root')
);

Example 2: how to change grid size with conditional expression in react

<Grid.Column width={ condition ? <column number if true> : <column number if false> } />
<Grid item xs={12} sm={isLogic ? 8 : 12}></Grid>