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react conditionals

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Cameron Reaney answered on January 8, 2021 Popularity 10/10 Helpfulness 3/10

answer react conditionals

related JSX Conditionals: &&

related JSX and conditional

related conditional rendering react

react conditionals

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<Fragment>
  {showMyComponent
    ? <MyComponent />
    : <OtherComponent />}
</Fragment>

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Source: devhints.io

Tags: whatever

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Contributed on Nov 17 2022

Cameron Reaney

0 Answers Avg Quality 2/10

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JSX Conditionals: &&

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/*
&& works best in conditionals that will sometimes do an action, but other times do 
NOTHING at all.
*/

const tasty = (
  <ul>
    <li>Applesauce</li>
    { !baby && <li>Pizza</li> }
    { age > 15 && <li>Brussels Sprouts</li> }
    { age > 20 && <li>Oysters</li> }
    { age > 25 && <li>Grappa</li> }
  </ul>
);

/*
If the expression on the left of the && evaluates as true, then the JSX on the 
right of the && will be rendered. If the first expression is false, however, then 
the JSX to the right of the && will be ignored and not rendered.
*/

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jun 11 2022

M Hassan khan

0 Answers Avg Quality 2/10

JSX and conditional

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// JSX and conditional
// In JSX, && is commonly used to render an element based on a boolean condition. && works best in conditionals that will sometimes do an action, but other times do nothing at all.

// If the expression on the left of the && evaluates as true, then the JSX on the right of the && will be rendered. If the first expression is false, however, then the JSX to the right of the && will be ignored and not rendered.
// All of the list items will display if
// baby is false and age is above 25
const tasty = (
  <ul>
    <li>Applesauce</li>
    { !baby && <li>Pizza</li> }
    { age > 15 && <li>Brussels Sprouts</li> }
    { age > 20 && <li>Oysters</li> }
    { age > 25 && <li>Grappa</li> }
  </ul>
);

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: conditional cond

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Contributed on Oct 25 2022

Chetan Nada

0 Answers Avg Quality 2/10

conditional rendering react

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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')
);

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: reactjs.org

Tags: conditional-rendering conditional-

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Contributed on Jan 08 2021

Funny Fish

0 Answers Avg Quality 2/10

react conditionals

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JSX and conditional

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