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W3Schools 튜토리얼을 P-Reinforce v3.1 포맷으로 위키화(영어 본문, 한/영 섹션 헤더). - Topic_HTML: 59문서 (튜토리얼+예제, 레퍼런스/메타 제외) - Topic_CSS: 190문서 (메인 + Advanced/Flexbox/Grid/RWD 전체) - Topic_JavaScript: 120문서 (코어 언어; Temporal/DOM상세/BOM/WebAPI/AJAX/jQuery/Graphics 등은 후속) 각 폴더 00_INDEX.md(MOC) 포함. 코드 verbatim, 미확인분은 "Not found in source" 표기. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
111 lines
4.9 KiB
Markdown
111 lines
4.9 KiB
Markdown
---
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id: html-headings
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title: "HTML Headings"
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category: "Frontend"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["heading tags", "h1", "h2", "h6", "headings hierarchy", "HTML titles"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.90
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created_at: 2026-06-23
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updated_at: 2026-06-23
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review_reason: ""
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merge_history: []
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tags: ["html", "web", "frontend", "w3schools", "headings", "semantics"]
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raw_sources: ["https://www.w3schools.com/html/html_headings.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[HTML Headings]]
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## 🎯 한 줄 통찰 (One-line insight)
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HTML headings `<h1>`–`<h6>` express the importance and structure of content (not merely its size), with `<h1>` most important and `<h6>` least. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **Six heading levels** — `<h1>` through `<h6>`. [S1]
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- **Importance, not size** — `<h1>` defines the most important heading; `<h6>` the least important. [S1]
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- **Browsers add margins** — browsers automatically add some white space (a margin) before and after a heading. [S1]
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- **Headings are for structure** — search engines use headings to index the structure and content of web pages; users skim them to grasp a page. [S1]
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- **Size is styled with CSS** — use the `style` attribute with `font-size` to change a heading's rendered size. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **One `<h1>` per page** — use `<h1>` for the main title (or logo). [S1]
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- **Logical hierarchy** — `<h1>` for page title → `<h2>` for section titles → `<h3>` for subsections, in order. [S1]
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- **Don't misuse headings for visuals** — do not use headings just to make text big or bold; use CSS for that. [S1]
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- **Resize via inline style** — `<h1 style="font-size:60px;">…</h1>`. [S1]
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## 📖 세부 내용 (Details)
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**HTML Headings**
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HTML headings are titles or subtitles that you want to display on a webpage. They are defined with the `<h1>` to `<h6>` tags. `<h1>` defines the most important heading; `<h6>` defines the least important heading: [S1]
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```html
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<h1>Heading 1</h1>
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<h2>Heading 2</h2>
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<h3>Heading 3</h3>
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<h4>Heading 4</h4>
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<h5>Heading 5</h5>
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<h6>Heading 6</h6>
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```
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> **Note:** Browsers automatically add some white space (a margin) before and after a heading. [S1]
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**Headings Are Important**
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Headings are important. Search engines use the headings to index the structure and content of your web pages. Users often skim a page by its headings; it is important to use headings to show the document structure. `<h1>` headings should be used for main headings, followed by `<h2>` headings, then the less important `<h3>`, and so on. [S1]
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> **Note:** Use HTML headings for headings only. Don't use headings to make text BIG or **bold**. [S1]
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**Bigger Headings**
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Each HTML heading has a default size. However, you can specify the size for any heading with the `style` attribute, using the CSS `font-size` property: [S1]
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```html
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<h1 style="font-size:60px;">Heading 1</h1>
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```
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**Heading reference table**
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| Tag | Description |
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|---|---|
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| `<html>` | Defines the root of an HTML document |
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| `<body>` | Defines the document's body |
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| `<h1>` to `<h6>` | Defines HTML headings |
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## 🛠️ 적용 사례 (Applied in summary)
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A typical applied structure (e.g. a travel guide) uses `<h1>` for the page title, `<h2>` for region/section titles, and `<h3>` for country/subsection titles — demonstrating heading hierarchy as document outline. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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All six heading levels (HTML):
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```html
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<h1>Heading 1</h1>
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<h2>Heading 2</h2>
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<h3>Heading 3</h3>
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<h4>Heading 4</h4>
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<h5>Heading 5</h5>
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<h6>Heading 6</h6>
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```
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Resizing a heading with inline CSS:
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```html
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<h1 style="font-size:60px;">Heading 1</h1>
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```
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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The source stresses semantics over appearance: headings should encode document structure for search engines and users, not be repurposed to make text big or bold — use CSS `font-size` instead. [S1]
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.90
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[HTML Tutorial]]
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- **관련 개념:** [[HTML Paragraphs]], [[HTML Basic]], [[HTML Styles]], [[HTML Elements]]
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- **참조 맥락:** Referenced whenever structuring page content into titles and sections for readers and search engines.
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## 📚 출처 (Sources)
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- [S1] W3Schools — HTML Headings — https://www.w3schools.com/html/html_headings.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "HTML Headings" page (Astra wiki-curation, P-Reinforce v3.1 format).
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