/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

0 vote248 views1 answer
React-data-table-component cell action stack overflow
Javascript React
0 vote238 views2 answers
Storage package npm react
Javascript React
3 votes269 views2 answers
Export default class react
Javascript React
3 votes224 views1 answer
React native run on device command line
Javascript React
1 vote216 views1 answer
Font awesome react native icons
Javascript React
2 votes250 views3 answers
How to get current date in react js
Javascript React
1 vote244 views1 answer
Java.lang.outofmemoryerror (no error message) react native
Javascript React
0 vote284 views1 answer
What is the difference between throttling and debounce and raf throttling in react
Javascript React
0 vote232 views1 answer
How to convert timestamp to date in react native
Javascript React
6 votes243 views1 answer
React native rotate
Javascript React