/Javascript/React/React native conditional rendering

React native conditional rendering

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

Source: reactjs.org

React if statement

render() {
  const isLoggedIn = this.state.isLoggedIn;
  return (
    <div>
      The user is <b>{isLoggedIn ? 'currently' : 'not'}</b> logged in.    </div>
  );
}

Source: reactjs.org

Conditional Rendering in React js

function UserGreeting(props) {
  return <h1>Welcome back!</h1>;
}

function GuestGreeting(props) {
  return <h1>Please sign up.</h1>;
}

function Greeting(props) {
  const isLoggedIn = props.isLoggedIn;
  if (isLoggedIn) {
    return <UserGreeting />;
  }
  return <GuestGreeting />;
}

ReactDOM.render(
  // Try changing to isLoggedIn={true}:
  <Greeting isLoggedIn={false} />,
  document.getElementById('root')
);

Source: reactjs.org

Similar codes

1 vote247 views3 answers
Iframe in react
Javascript React
29 votes237 views6 answers
If react
Javascript React
5 votes246 views6 answers
Box shadow in react native
Javascript React
0 vote247 views1 answer
Why my favicon icon is not removing in react
Javascript React
0 vote231 views1 answer
React navigation history clear
Javascript React
0 vote219 views1 answer
How to make a textarea unwritable in react native
Javascript React
1 vote236 views1 answer
Slider on release call api react material ui
Javascript React
0 vote263 views3 answers
React native version
Javascript React
28 votes230 views6 answers
React fontawesome
Javascript React
0 vote246 views1 answer
React native whatsapp integration
Javascript React