docs(10_Wiki): W3Schools 위키화 — HTML/CSS/JavaScript(core)
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>
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id: css-flexbox-container
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title: "CSS Flexbox Container"
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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: ["flex container", "flex-direction", "flex-wrap", "flex-flow", "justify-content align-items align-content"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.86
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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: ["css", "web", "frontend", "w3schools", "flexbox", "layout"]
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raw_sources: ["https://www.w3schools.com/css/css3_flexbox_container.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[CSS Flexbox Container]]
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## 🎯 한 줄 통찰 (One-line insight)
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The flex container is the parent (set with `display: flex` or `inline-flex`) and exposes container-level properties — `flex-direction`, `flex-wrap`, `flex-flow`, `justify-content`, `align-items`, and `align-content` — that govern how its flex items are laid out and aligned. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **The container** — must be set to `flex` or `inline-flex` via the `display` property. [S1]
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- **flex-direction** — sets the display-direction of flex items. [S1]
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- **flex-wrap** — specifies whether the flex items should wrap or not. [S1]
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- **flex-flow** — a shorthand property for setting both `flex-direction` and `flex-wrap`. [S1]
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- **justify-content** — aligns the flex items when they do not use all available space on the main-axis (horizontally). [S1]
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- **align-items** — aligns the flex items when they do not use all available space on the cross-axis (vertically). [S1]
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- **align-content** — aligns the flex lines when there is extra space in the cross axis and flex items wrap. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Direction control** — switch the main axis with `flex-direction: row | column | row-reverse | column-reverse`. [S1]
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- **Wrapping control** — allow multi-line layouts with `flex-wrap: nowrap | wrap | wrap-reverse`. [S1]
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- **Shorthand** — combine direction and wrapping in one declaration, e.g. `flex-flow: row wrap`. [S1]
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- **Axis alignment** — `justify-content` aligns on the main (horizontal) axis; `align-items` / `align-content` align on the cross (vertical) axis. [S1]
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## 📖 세부 내용 (Details)
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The flex container has seven key properties: `display` (must be set to `flex` or `inline-flex`), `flex-direction`, `flex-wrap`, `flex-flow`, `justify-content`, `align-items`, and `align-content`. [S1]
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**flex-direction** — controls the display-direction of flex items, with the values demonstrated on the page: [S1]
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```css
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.flex-container {
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display: flex;
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flex-direction: row;
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}
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```
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```css
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.flex-container {
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display: flex;
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flex-direction: column;
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}
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```
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```css
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.flex-container {
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display: flex;
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flex-direction: row-reverse;
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}
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```
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```css
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.flex-container {
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display: flex;
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flex-direction: column-reverse;
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}
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```
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The four values are: `row` (default — items left to right), `column` (items top to bottom), `row-reverse` (items right to left), and `column-reverse` (items bottom to top). [S1]
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**flex-wrap** — specifies whether items wrap when space is insufficient, with the values demonstrated on the page: [S1]
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```css
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.flex-container {
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display: flex;
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flex-wrap: nowrap;
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}
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```
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```css
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.flex-container {
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display: flex;
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flex-wrap: wrap;
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}
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```
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```css
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.flex-container {
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display: flex;
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flex-wrap: wrap-reverse;
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}
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```
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The three values are: `nowrap` (default — items don't wrap, shown as boxes 1–9 in a single line), `wrap` (items wrap onto multiple lines as needed), and `wrap-reverse` (items wrap in reverse order). [S1]
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**flex-flow** — a shorthand property for setting both `flex-direction` and `flex-wrap`, demonstrated as: [S1]
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```css
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.flex-container {
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display: flex;
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flex-flow: row wrap;
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}
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```
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**justify-content, align-items, align-content** — these properties are part of the container's property set (descriptions in the table below). On this page their specific demonstrated values were not captured in the fetched content; the source notes that horizontal alignment (`justify-content`) and vertical alignment (`align-items` & `align-content`) are covered on subpages. Specific value-by-value examples: Not found in source (for this page). [S1]
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**CSS Flexbox container properties reference** [S1]
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| Property | Description |
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|----------|-------------|
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| `display` | Must be set to `flex` or `inline-flex` |
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| `flex-direction` | Sets the display-direction of flex items |
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| `flex-wrap` | Specifies whether the flex items should wrap or not |
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| `flex-flow` | A shorthand property for `flex-direction` and `flex-wrap` |
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| `justify-content` | Aligns the flex items when they do not use all available space on the main-axis (horizontally) |
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| `align-items` | Aligns the flex items when they do not use all available space on the cross-axis (vertically) |
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| `align-content` | Aligns the flex lines when there is extra space in the cross axis and flex items wrap |
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## 🛠️ 적용 사례 (Applied in summary)
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The page's applied examples demonstrate each `flex-direction` value (`row`, `column`, `row-reverse`, `column-reverse`) on a `.flex-container`, each `flex-wrap` value (`nowrap`, `wrap`, `wrap-reverse`) with nine numbered boxes, and the `flex-flow: row wrap` shorthand. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Set direction and wrapping (language: CSS):
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```css
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.flex-container {
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display: flex;
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flex-direction: row;
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flex-wrap: wrap;
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}
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```
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Shorthand equivalent (language: CSS):
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```css
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.flex-container {
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display: flex;
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flex-flow: row wrap;
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}
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```
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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No contradictions found in the source.
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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:** 0.86
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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:** [[CSS Tutorial]]
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- **관련 개념:** [[CSS Flexbox Intro]], [[CSS Flex Items]], [[CSS Grid]], [[CSS Media Queries]]
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- **참조 맥락:** Referenced when configuring the parent flex container's direction, wrapping, and alignment behavior.
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## 📚 출처 (Sources)
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- [S1] W3Schools — CSS Flexbox Container — https://www.w3schools.com/css/css3_flexbox_container.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Flexbox Container" page (Astra wiki-curation, P-Reinforce v3.1 format).
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