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koriweb 9609c04755 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>

2026-06-23 19:21:18 +09:00

3.9 KiB

Raw Blame History

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title

CSS Border Shorthand

🎯 한 줄 통찰 (One-line insight)

To shorten the code, the border property is a shorthand that combines border-width, border-style (required), and border-color in a single declaration, and the same pattern works for each individual side (border-bottom, border-left, etc.). [S1]

🧠 핵심 개념 (Core concepts)

Shorthand purpose — to shorten the code, it is also possible to specify all the individual border properties in one property. [S1]
border is a shorthand property for: border-width, border-style (required), and border-color. [S1]
Order — the shorthand lists width, then style, then color (e.g. 5px solid red). [S1]
Per-side shorthands — the same approach works for individual sides such as border-bottom and border-left. [S1]

🧩 추출된 패턴 (Extracted patterns)

Width–style–color triple — collapse three declarations into one border: <width> <style> <color>;. [S1]
Directional shorthand — apply the same triple to one side only with border-top/right/bottom/left. [S1]

📖 세부 내용 (Details)

Border - Shorthand Property [S1] To shorten the code, it is also possible to specify all the individual border properties in one property.

The border property is a shorthand property for the following individual border properties: [S1]

border-width
border-style (required)
border-color

Example — combining width, style, and color in one declaration: [S1]

p {
  border: 5px solid red;
}

Left Border [S1] You can also specify all the individual border properties for just one side.

Example — left side only: [S1]

p {
  border-left: 6px solid red;
}

Bottom Border [S1] Example — bottom side only: [S1]

p {
  border-bottom: 6px solid red;
}

🛠️ 적용 사례 (Applied in summary)

The page's own applied examples are the three paragraph rules above: the full border shorthand, the border-left shorthand, and the border-bottom shorthand. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Full border shorthand (language: CSS):

p {
  border: 5px solid red;
}

Single-side shorthand:

p {
  border-left: 6px solid red;
}

⚖️ 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: 0.89
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: CSS Tutorial
관련 개념: CSS Border Style, CSS Border Width, CSS Border Color, CSS Border Sides
참조 맥락: The concise way to apply width, style, and color together; preferred over separate declarations.

📚 출처 (Sources)

[S1] W3Schools — CSS Border Shorthand — https://www.w3schools.com/css/css_border_shorthand.asp

📝 변경 이력 (Change history)

2026-06-23: Initial draft synthesized from the W3Schools "CSS Border Shorthand" page (Astra wiki-curation, P-Reinforce v3.1 format).

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