docs(10_Wiki): Topic_Business/General/Graphic/Programming을 Topics/ 하위로 이동

최상위 10_Wiki/Topic_*였던 4개 카테고리 폴더를 10_Wiki/Topics/Topic_* 로 재배치. 콘텐츠 변경 없음(순수 폴더 이동) — Topics/ 하위 나머지 폴더는 이미 지난 커밋에서 전부 정리된 상태(잔존 항목은 에이전트 운영 상태 및 사용자가 보존을 요청한 업데이트0615/무제 3.canvas 뿐).
2026-07-05 00:44:01 +09:00
parent e9cbf23ab5
commit 9a135bd19d
6127 changed files with 0 additions and 0 deletions
@@ -0,0 +1,72 @@
+---
+id: w3css-flexbox
+title: "W3CSS Flexbox"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["w3-flex", "CSS Flexbox", "perfect centering", "W3.CSS 플렉스박스"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.88
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["w3css", "css-framework", "w3schools", "flexbox"]
+raw_sources: ["https://www.w3schools.com/w3css/w3css_flexbox.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[W3CSS Flexbox]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+"Perfect centering" — a notoriously fiddly CSS problem historically — collapses to exactly TWO properties in flexbox: `justify-content:center` (horizontal) plus `align-items:center` (vertical) on the SAME container, which the source explicitly calls out as "the solution" to a common style problem, contrasting flexbox's simplicity against older centering hacks. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`w3-flex`** (W3.CSS 5.0+) — one-dimensional flex container (row OR column, unlike grid's row AND column). [S1]
+- **`flex-direction`** — `row` (default, left-to-right), `column`, `row-reverse`, `column-reverse`. [S1]
+- **`flex-wrap`** — `nowrap` (default), `wrap`, `wrap-reverse`. [S1]
+- **`justify-content`** — aligns items along the main axis: `center`, `flex-start`, `flex-end`, `space-around`, `space-between`, `space-evenly`. [S1]
+- **`align-items`** — aligns items along the cross axis: `center`, `flex-start`, `flex-end`, `stretch` (default), `baseline`. [S1]
+- **`align-content`** — aligns entire WRAPPED LINES (not individual items) when `flex-wrap:wrap` is active; distinct from `align-items`. [S1]
+- **Perfect centering recipe** — `justify-content:center` + `align-items:center` together on one flex container. [S1]
+
+## 📖 세부 내용 (Details)
+- Basic flex container: `<div class="w3-flex" style="gap:8px"><div>1</div><div>2</div><div>3</div></div>`. [S1]
+- Reversed direction: `<div class="w3-flex" style="flex-direction:row-reverse">`. [S1]
+- Baseline alignment (items with different font sizes align by text baseline, not box edge): `<div class="w3-flex" style="align-items:baseline">`. [S1]
+- Perfect centering: `<div class="w3-flex" style="height:300px;justify-content:center;align-items:center">`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **align-content와 align-items의 차이**: align-items는 개별 아이템을, align-content는 줄바꿈된 전체 라인을 정렬한다는 점이 구분됨(flex-wrap:wrap 상태에서만 의미가 있음). [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — justify-content+align-items를 함께 center로 설정하는 "완벽한 중앙 정렬" 레시피가 실전에서 가장 자주 쓰이는 플렉스박스 패턴이다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Perfect centering with two flexbox properties (HTML/CSS):
+```html
+<div class="w3-flex" style="height:300px;justify-content:center;align-items:center">
+  <div>1</div><div>2</div><div>3</div>
+</div>
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **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:** [[W3.CSS Tutorial]]
+- **관련 개념:** [[W3CSS Grid]], [[W3CSS Flex Items]]
+- **참조 맥락:** 1차원 레이아웃 컨테이너 — 개별 플렉스 아이템 속성(Flex Items) 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — W3.CSS Flexbox — https://www.w3schools.com/w3css/w3css_flexbox.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "W3.CSS Flexbox" page (Astra wiki-curation, P-Reinforce v3.1 format).