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80 lines
4.0 KiB
Markdown
80 lines
4.0 KiB
Markdown
---
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id: w3css-bars
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title: "W3CSS Bars"
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category: "Programming_Language"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["w3-bar", "w3-bar-block", "w3-bar-item", "W3.CSS 바"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.87
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created_at: 2026-07-04
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updated_at: 2026-07-04
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review_reason: ""
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merge_history: []
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tags: ["w3css", "css-framework", "w3schools", "bars", "navigation"]
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raw_sources: ["https://www.w3schools.com/w3css/w3css_bars.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[W3CSS Bars]]
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## 🎯 한 줄 통찰 (One-line insight)
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`w3-bar` (horizontal) and `w3-bar-block` (vertical) are the exact same conceptual container differing only in ONE class name — meaning every color, hover, button, and responsive technique demonstrated for a horizontal bar transfers identically to a vertical sidebar, so this single chapter is really the foundation for both the later Navigation Bars AND Sidebar chapters. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **`w3-bar`** — horizontal container for bar items. **`w3-bar-block`** — vertical container, same item classes apply. [S1]
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- **`w3-bar-item`** — provides correct spacing/padding/positioning for each item inside a bar; works on any element (`div`, `a`, etc.). [S1]
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- **Color + hover-color composability** — any `w3-color` class sets the bar's base color, and any `w3-hover-color` class can be added per-item for a distinct hover color. [S1]
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- **`w3-button`** — turns bar items (especially `<a>` links) into clickable button-styled elements. [S1]
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- **`w3-mobile`** — makes bar items responsive (stack/adjust on small screens). [S1]
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- **`w3-right`** — right-aligns a specific bar item within the bar. [S1]
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## 📖 세부 내용 (Details)
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- Horizontal bar: `<div class="w3-bar w3-green"><div class="w3-bar-item">London</div><div class="w3-bar-item">Paris</div><div class="w3-bar-item">Tokyo</div></div>`. [S1]
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- Vertical bar (same items, one class swapped): `<div class="w3-bar-block w3-green">...</div>`. [S1]
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- Bar as navigation with buttons: `<div class="w3-bar w3-black"><a href="#" class="w3-bar-item w3-button">London</a>...</div>`. [S1]
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- Right-aligned last item: `<a href="#" class="w3-bar-item w3-button w3-right">Tokyo</a>` as the final child. [S1]
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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- 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources).
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## 🛠️ 적용 사례 (Applied in summary)
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현재 발견된 실제 적용 사례가 없습니다 — w3-bar 하나의 클래스 교체(w3-bar-block)만으로 수평/수직 네비게이션을 모두 만드는 패턴이 다음 챕터들(Navigation, Sidebar)의 기반이 된다. [S1]
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## 💻 코드 패턴 (Code patterns)
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The same items in horizontal vs vertical bar — only the container class changes (HTML):
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```html
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<!-- Horizontal -->
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<div class="w3-bar w3-black">
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<a href="#" class="w3-bar-item w3-button">Home</a>
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<a href="#" class="w3-bar-item w3-button">Link 1</a>
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</div>
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<!-- Vertical: same items, w3-bar-block instead of w3-bar -->
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<div class="w3-bar-block w3-black">
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<a href="#" class="w3-bar-item w3-button">Home</a>
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<a href="#" class="w3-bar-item w3-button">Link 1</a>
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</div>
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```
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.87
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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:** [[W3.CSS Tutorial]]
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- **관련 개념:** [[W3CSS Effects]], [[W3CSS Dropdowns]], [[W3CSS Navigation]], [[W3CSS Sidebar]]
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- **참조 맥락:** Navigation Components 섹션 첫 항목이자 기초 — 드롭다운(Dropdowns) 챕터로 이어짐.
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## 📚 출처 (Sources)
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- [S1] W3Schools — W3.CSS Bars — https://www.w3schools.com/w3css/w3css_bars.asp
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## 📝 변경 이력 (Change history)
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- 2026-07-04: Initial draft synthesized from the W3Schools "W3.CSS Bars" page (Astra wiki-curation, P-Reinforce v3.1 format).
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