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-border-style
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title: "CSS Border Style"
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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: ["border-style", "CSS border style", "border types", "dotted border", "solid border"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.9
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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", "border", "border-style"]
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raw_sources: ["https://www.w3schools.com/css/css_border.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[CSS Border Style]]
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## 🎯 한 줄 통찰 (One-line insight)
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The `border-style` property specifies what kind of border to display and is the gatekeeper of all border styling — none of the other border properties (width, color) have any effect unless `border-style` is set. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **CSS border properties** allow you to specify the style, width, and color of an element's border. [S1]
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- **`border-style`** specifies what kind of border to display. [S1]
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- **`border-style` is required** — none of the other CSS border properties will have any effect unless `border-style` is set. [S1]
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- **Per-side values** — the `border-style` property can take from one to four values, applied to the top, right, bottom, and left borders respectively. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Style-first rule** — always declare `border-style` before width/color; the others are inert without it. [S1]
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- **One-to-four value shorthand** — a single `border-style` declaration can style all four sides at once (e.g. `dotted dashed solid double`). [S1]
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## 📖 세부 내용 (Details)
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**Border Style** [S1]
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The `border-style` property specifies what kind of border to display.
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The following values are allowed: [S1]
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| Value | Meaning |
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|-------|---------|
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| `dotted` | Defines a dotted border |
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| `dashed` | Defines a dashed border |
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| `solid` | Defines a solid border |
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| `double` | Defines a double border |
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| `groove` | Defines a 3D grooved border (effect depends on the border-color value) |
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| `ridge` | Defines a 3D ridged border (effect depends on the border-color value) |
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| `inset` | Defines a 3D inset border (effect depends on the border-color value) |
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| `outset` | Defines a 3D outset border (effect depends on the border-color value) |
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| `none` | Defines no border |
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| `hidden` | Defines a hidden border |
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The `border-style` property can have from one to four values (for the top border, right border, bottom border, and the left border). [S1]
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**Example** — demonstrating all of the border-style values, including a `mix` class that supplies four values: [S1]
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```css
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p.dotted {border-style: dotted;}
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p.dashed {border-style: dashed;}
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p.solid {border-style: solid;}
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p.double {border-style: double;}
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p.groove {border-style: groove;}
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p.ridge {border-style: ridge;}
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p.inset {border-style: inset;}
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p.outset {border-style: outset;}
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p.none {border-style: none;}
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p.hidden {border-style: hidden;}
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p.mix {border-style: dotted dashed solid double;}
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```
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**Note:** None of the OTHER CSS border properties (which you will learn more about in the next chapters) will have ANY effect unless the `border-style` property is set! [S1]
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## 🛠️ 적용 사례 (Applied in summary)
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The example stylesheet above is the page's own applied example: a set of paragraph classes each demonstrating one `border-style` value, plus a `mix` class applying four values at once. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Single value applied to all four sides (language: CSS):
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```css
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p.solid {border-style: solid;}
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```
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Four values, one per side (top, right, bottom, left):
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```css
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p.mix {border-style: dotted dashed solid double;}
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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:** 0.90
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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:** [[CSS Tutorial]]
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- **관련 개념:** [[CSS Border Width]], [[CSS Border Color]], [[CSS Border Sides]], [[CSS Border Shorthand]]
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- **참조 맥락:** The mandatory first step for any element border; referenced whenever width or color is applied.
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## 📚 출처 (Sources)
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- [S1] W3Schools — CSS Border Style — https://www.w3schools.com/css/css_border.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Border Style" page (Astra wiki-curation, P-Reinforce v3.1 format).
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