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NextJSframework~20 mins

Open Graph metadata in NextJS - Practice Problems & Coding Challenges

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Challenge - 5 Problems
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Open Graph Mastery in Next.js
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Test your skills under time pressure!
❓ component_behavior
intermediate
2:00remaining
What is the output of this Next.js component with Open Graph metadata?
Consider this Next.js component that sets Open Graph metadata using the element. What will be the rendered HTML meta tags in the page head?
NextJS
import Head from 'next/head';

export default function Page() {
  return (
    <>
      <Head>
        <meta property="og:title" content="My Page Title" />
        <meta property="og:description" content="A description of my page." />
        <meta property="og:image" content="https://example.com/image.png" />
      </Head>
      <main>
        <h1>Welcome</h1>
      </main>
    </>
  );
}
A<meta name="og:title" content="My Page Title" />\n<meta name="og:description" content="A description of my page." />\n<meta name="og:image" content="https://example.com/image.png" />
B<meta property="title" content="My Page Title" />\n<meta property="description" content="A description of my page." />\n<meta property="image" content="https://example.com/image.png" />
C<meta content="My Page Title" property="og:title" />\n<meta content="A description of my page." property="og:description" />\n<meta content="https://example.com/image.png" property="og:image" />
D<meta property="og:title" content="My Page Title" />\n<meta property="og:description" content="A description of my page." />\n<meta property="og:image" content="https://example.com/image.png" />
Attempts:
2 left
💡 Hint
Open Graph meta tags use the 'property' attribute, not 'name'.
📝 Syntax
intermediate
2:00remaining
Which option causes a syntax error in Next.js Open Graph metadata usage?
Identify which code snippet will cause a syntax error when used inside a Next.js component's for Open Graph metadata.
NextJS
import Head from 'next/head';

export default function Page() {
  return (
    <>
      <Head>
        {/* Insert meta tags here */}
      </Head>
      <main><h1>Hello</h1></main>
    </>
  );
}
A<meta property="og:title" content="Title" />
B<meta property='og:description' content='Description' />
C<meta property="og:image" content="https://example.com/image.png" />
D<meta property="og:url" content="https://example.com" />
Attempts:
2 left
💡 Hint
Self-closing tags in JSX must end with a slash.
🔧 Debug
advanced
2:00remaining
Why does the Open Graph image not appear when sharing the page?
A developer added Open Graph meta tags in Next.js but the image does not show when sharing the page on social media. What is the most likely cause?
NextJS
import Head from 'next/head';

export default function Page() {
  return (
    <>
      <Head>
        <meta property="og:title" content="My Site" />
        <meta property="og:image" content="/images/og-image.png" />
      </Head>
      <main><h1>Welcome</h1></main>
    </>
  );
}
AThe image URL is relative and should be absolute for Open Graph.
BThe meta tags must be inside <body>, not <head>.
CThe og:title property is missing a content attribute.
DNext.js does not support Open Graph metadata.
Attempts:
2 left
💡 Hint
Open Graph requires full URLs for images.
❓ state_output
advanced
2:00remaining
What is the effect of dynamically changing Open Graph metadata in Next.js?
If you update Open Graph meta tags dynamically on the client side after page load in Next.js, what will be the effect when sharing the page URL on social media?
NextJS
import Head from 'next/head';
import { useState, useEffect } from 'react';

export default function Page() {
  const [title, setTitle] = useState('Initial Title');

  useEffect(() => {
    setTimeout(() => setTitle('Updated Title'), 3000);
  }, []);

  return (
    <>
      <Head>
        <meta property="og:title" content={title} />
      </Head>
      <main><h1>{title}</h1></main>
    </>
  );
}
AOpen Graph metadata is ignored by social media.
BSocial media will see 'Updated Title' because metadata updates dynamically.
CSocial media will see 'Initial Title' because metadata is set at server render time.
DThe page will crash due to changing meta tags dynamically.
Attempts:
2 left
💡 Hint
Social media scrapers read metadata from the server response, not client updates.
🧠 Conceptual
expert
3:00remaining
Which Next.js feature best supports setting Open Graph metadata for multiple pages efficiently?
You want to set unique Open Graph metadata for many pages in a Next.js app without repeating code. Which approach is best?
ACreate a reusable Head component that accepts props for Open Graph tags and use it in each page.
BManually add <Head> with meta tags in every page component separately.
CUse a global CSS file to define Open Graph metadata styles.
DSet Open Graph metadata only in _app.js once for all pages.
Attempts:
2 left
💡 Hint
Think about code reuse and passing data per page.