2nd/10_Wiki/Topic_HTML/HTML_Layout.md

---
id: html-layout
title: "HTML Layout"
category: "Frontend"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["HTML layout elements", "page layout", "semantic layout", "CSS layout techniques", "header nav footer", "web page structure"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.88
created_at: 2026-06-23
updated_at: 2026-06-23
review_reason: ""
merge_history: []
tags: ["html", "web", "frontend", "w3schools", "layout", "semantic"]
raw_sources: ["https://www.w3schools.com/html/html_layout.asp"]
applied_in: []
github_commit: ""
---

# [[HTML Layout]]

## 🎯 한 줄 통찰 (One-line insight)
Web pages are commonly built from semantic layout elements (header, nav, section, article, aside, footer, details, summary) and arranged with CSS layout techniques such as frameworks, float, flexbox, and grid. [S1]

## 🧠 핵심 개념 (Core concepts)
- **Multi-column display** — websites often display content in multiple columns, like a magazine or a newspaper. [S1]
- **Semantic layout elements** — HTML provides elements that describe the role of each part of a page (header, nav, section, article, aside, footer, details, summary). [S1]
- **Layout techniques** — the page structure can be arranged using CSS frameworks, CSS float, CSS flexbox, or CSS grid. [S1]
- **Semantics cross-reference** — semantic elements are described further in the HTML Semantics chapter. [S1]

## 🧩 추출된 패턴 (Extracted patterns)
- **Header / footer pattern** — `<header>` and `<footer>` bracket a document or section. [S1]
- **Navigation block** — `<nav>` groups a set of navigation links. [S1]
- **Content grouping** — `<section>` for thematic sections, `<article>` for independent self-contained content, `<aside>` for sidebar-style related content. [S1]
- **Disclosure widget** — `<details>` + `<summary>` for content the user can open and close on demand. [S1]
- **Layout strategy selection** — choose a CSS technique (framework, float, flexbox, grid) for the visual arrangement. [S1]

## 📖 세부 내용 (Details)
**HTML layout elements**
Websites often display content in multiple columns (like a magazine or a newspaper). HTML has several semantic elements that define the different parts of a web page: [S1]

| Element | Description |
|---|---|
| `<header>` | Defines a header for a document or a section |
| `<nav>` | Defines a set of navigation links |
| `<section>` | Defines a section in a document |
| `<article>` | Defines independent, self-contained content |
| `<aside>` | Defines content aside from the content (like a sidebar) |
| `<footer>` | Defines a footer for a document or a section |
| `<details>` | Defines additional details that the user can open and close on demand |
| `<summary>` | Defines a heading for the `<details>` element |

You can read more about semantic elements in the HTML Semantics chapter. [S1]

**HTML layout techniques**
There are four techniques to create multi-column layouts. Each technique has its pros and cons: [S1]

- **CSS framework** — if you want to create your layout fast, you can use a CSS framework, like W3.CSS or Bootstrap. [S1]
- **CSS float** — you can create an entire web layout using the CSS `float` property. Float is easy to learn — you just need to remember how the `float` and `clear` properties work. A disadvantage is that floating elements are tied to the document flow, which may harm flexibility. [S1]
- **CSS flexbox** — use of flexbox ensures that elements behave predictably when the page layout must accommodate different screen sizes and different display devices. [S1]
- **CSS grid** — the CSS Grid Layout Module offers a grid-based layout system, with rows and columns, making it easier to design web pages without having to use floats and positioning. [S1]

## 🛠️ 적용 사례 (Applied in summary)
The semantic elements table and the four CSS techniques are themselves the applied guidance: combine semantic structure (header/nav/section/article/aside/footer) with one CSS technique (framework, float, flexbox, or grid) to build a page. No external project/commit applications found in the source.

## 💻 코드 패턴 (Code patterns)
Semantic page skeleton (composed from the layout elements described in the source):
```html
<header>...</header>
<nav>...</nav>
<section>
  <article>...</article>
  <aside>...</aside>
</section>
<footer>...</footer>
```
Disclosure widget:
```html
<details>
  <summary>Heading</summary>
  ...additional details...
</details>
```

## ⚖️ 비교 및 선택 기준 (Comparison & decision criteria)
- **CSS framework (W3.CSS / Bootstrap)** — fastest way to create a layout. [S1]
- **CSS float** — easy to learn (`float` + `clear`), but floating elements are tied to the document flow, which may harm flexibility. [S1]
- **CSS flexbox** — predictable behavior across different screen sizes and display devices. [S1]
- **CSS grid** — row/column grid system that avoids the need for floats and positioning. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
No contradictions found in the source.

## ✅ 검증 상태 및 신뢰도
- **상태:** draft
- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
- **신뢰 점수:** 0.88
- **중복 검사 결과:** 신규 생성 (New discovery)

## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[HTML Tutorial]]
- **관련 개념:** [[HTML Semantics]], [[HTML Responsive]], [[HTML Introduction]], [[HTML Head]]
- **참조 맥락:** Referenced when structuring the overall arrangement of a web page using semantic regions and a CSS layout technique.

## 📚 출처 (Sources)
- [S1] W3Schools — HTML Layout — https://www.w3schools.com/html/html_layout.asp

## 📝 변경 이력 (Change history)
- 2026-06-23: Initial draft synthesized from the W3Schools "HTML Layout" page (Astra wiki-curation, P-Reinforce v3.1 format).