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Updated: 2026年5月31日

Article And Section

Original task (JA): articleとsection

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Conclusion

Article And Section — free browser-based HTML practice

■ What this exercise teaches articleタグ内にsectionを2つ作ってください。各sectionの内容は自由です。

Why it matters in real projects

articleは独立したコンテンツ、sectionは関連する内容のまとまりです。 Similar patterns appear daily in code review and production UI work.

Step-by-step workflow

1. Read the guide and understand the goal of "Article And Section" 2. Review the HTML editor pane and start from the starter code 3. Open hints if stuck; compare your diff with the sample solution 4. Click Run and inspect preview/console output 5. Auto-check looks for output containing: <article>, <section>. 6. After success, continue with adjacent exercises in the same category

Core concept explained

articleは独立したコンテンツ、sectionは関連する内容のまとまりです。

Technical focus

Key HTML elements in this task: article, section.

Hint before you peek at the solution

articleが外側、sectionが内側

Sample solution walkthrough

The solution uses HTML tags such as article, section. Check nesting and closing tags. Explanation: articleは独立したコンテンツ、sectionは関連する内容のまとまりです。 Hint recap: articleが外側、sectionが内側

Solution code

📝 Sample code
<article>
  <section>セクション1</section>
  <section>セクション2</section>
</article>

Common mistakes for this exact task

・Skipping the hint: articleが外側、sectionが内側

Troubleshooting

Q: Preview does not change after Run A: Ensure you edited the HTML pane and clicked Run. Q: Looks correct but check fails A: Auto-check looks for output containing: <article>, <section>. Look for typos, full-width spaces, or unclosed tags. Q: Console shows errors A: Open DevTools Console and fix bracket/quote mismatches at the reported line. Q: Hard to type on mobile A: Use landscape mode or continue on desktop—the same URL keeps progress in localStorage.

Interview / portfolio tips

・Explain the techniques in "Article And Section" in your own words within 30 seconds ・Practice walking through each line of the sample solution on a whiteboard ・Be ready to discuss tags: article, section ・Mention responsive or accessibility trade-offs ・Prepare one alternative approach and why you chose this one

What to do after you pass

Move to the next exercise in the html-advanced track, then continue the learning roadmap at /en/learning/html-basic/.

Keywords

Free hands-on exercise covering articleとsection, html-advanced, 初級, article, section, article and section—search-friendly guide for Article And Section.

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■ Exercise task

articleタグ内にsectionを2つ作ってください。各sectionの内容は自由です。

Hint if stuck

articleが外側、sectionが内側

20pt

articleとsection

articleタグ内にsectionを2つ作ってください。各sectionの内容は自由です。

エラーをクリックで該当行をハイライト。✕=エラー ⚠=警告 ›=ログ。

Roadmap · All guides

Deep dive

"Article And Section" is a 初級-level HTML exercise. articleタグ内にsectionを2つ作ってください。各sectionの内容は自由です。 Run it in-browser with automatic checking.

articleは独立したコンテンツ、sectionは関連する内容のまとまりです。 Similar patterns appear daily in code review and production UI work.

Pair this with the html-basic roadmap. Exercise #28 reinforces core html-advanced skills.

Step-by-step workflow

  1. Read the guide and understand the goal of "Article And Section"
  2. Review the HTML editor pane and start from the starter code
  3. Open hints if stuck; compare your diff with the sample solution
  4. Click Run and inspect preview/console output
  5. Auto-check looks for output containing: <article>, <section>.
  6. After success, continue with adjacent exercises in the same category

How to read the sample solution

The solution uses HTML tags such as article, section. Check nesting and closing tags. Explanation: articleは独立したコンテンツ、sectionは関連する内容のまとまりです。 Hint recap: articleが外側、sectionが内側

Real-world & career relevance

Forms power sign-up, contact, and checkout. Proper label/input pairing is required in WCAG accessibility audits.

Common mistakes

  • Skipping the hint: articleが外側、sectionが内側
  • label for and input id mismatch
  • inputs without name inside form
  • checkbox without associated label

Troubleshooting

Preview does not change after Run
Ensure you edited the HTML pane and clicked Run.
Looks correct but check fails
Auto-check looks for output containing: <article>, <section>. Look for typos, full-width spaces, or unclosed tags.
Console shows errors
Open DevTools Console and fix bracket/quote mismatches at the reported line.
Hard to type on mobile
Use landscape mode or continue on desktop—the same URL keeps progress in localStorage.

Interview & portfolio tips

  • Explain the techniques in "Article And Section" in your own words within 30 seconds
  • Practice walking through each line of the sample solution on a whiteboard
  • Be ready to discuss tags: article, section
  • Mention responsive or accessibility trade-offs
  • Prepare one alternative approach and why you chose this one

Glossary

form
Container for user input submitted to a server.
label
Describes an input; pair with for/id.
checkbox
On/off selection control.

Keywords covered on this page

Free hands-on exercise covering articleとsection, html-advanced, 初級, article, section, article and section—search-friendly guide for Article And Section.

Related dev tools

Learning roadmap

Learning roadmap →

Related exercises

Frequently asked questions

Is "articleとsection" free?

This exercise is free and runs entirely in your browser. No account or credit card required.

Difficulty and time?

"articleとsection" is level "初級". Read the guide first; beginners can usually finish within 30 minutes. Allow 5–15 minutes per exercise. Use hints, then the solution if stuck.

What after a correct answer?

After a correct answer, use "Next exercise". When you finish a category, continue on the learning roadmap.

Works on mobile?

Works on mobile browsers, but typing code is easier on a desktop.

Where are other exercises?

All exercises: /en/learn/ with category filters.

Key takeaway for "articleとsection"?

articleは独立したコンテンツ、sectionは関連する内容のまとまりです。 Hint: articleが外側、sectionが内側

Where does html-advanced fit?

Forms power sign-up, contact, and checkout. Proper label/input pairing is required in WCAG accessibility audits.

Step-by-step for "Article And Section"?

1. Read the guide and understand the goal of "Article And Section"
2. Review the HTML editor pane and start from the starter code
3. Open hints if stuck; compare your diff with the sample solution
4. Click Run and inspect preview/console output
5. Auto-check looks for output containing:
,
.
6. After success, continue with adjacent exercises in the same category

How to read the sample solution?

The solution uses HTML tags such as article, section. Check nesting and closing tags.

Explanation: articleは独立したコンテンツ、sectionは関連する内容のまとまりです。

Hint recap: articleが外側、sectionが内側

Something is not working?

Preview does not change after Run → Ensure you edited the HTML pane and clicked Run.
Looks correct but check fails → Auto-check looks for output containing:
,
. Look for typos, full-width spaces, or unclosed tags.
Console shows errors → Open DevTools Console and fix bracket/quote mismatches at the reported line.
Hard to type on mobile → Use landscape mode or continue on desktop—the same URL keeps progress in localStorage.

Career / interview angle?

Explain the techniques in "Article And Section" in your own words within 30 seconds Practice walking through each line of the sample solution on a whiteboard Be ready to discuss tags: article, section Mention responsive or accessibility trade-offs Prepare one alternative approach and why you chose this one

Can I change the starter code?

Yes—if it works. Understanding the starter first, then adding minimal diffs, speeds up learning.

What do the points mean?

20pt is a difficulty hint, not a score you must maximize.