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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

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title

CSS Add Inline

🎯 한 줄 통찰 (One-line insight)

An inline style applies a unique style to a single element via its style attribute, but it loses many advantages of a style sheet by mixing content with presentation, so it should be used sparingly. [S1]

🧠 핵심 개념 (Core concepts)

Purpose — an inline style may be used to apply a unique style for a single element. [S1]
Mechanism — to use inline styles, add the style attribute to the relevant element. [S1]
Content — the style attribute can contain any CSS property declarations. [S1]
Caveat — an inline style loses many of the advantages of a style sheet (by mixing content with presentation); use this method sparingly. [S1]

🧩 추출된 패턴 (Extracted patterns)

Per-element override — attach declarations directly to one element via style="property:value;…". [S1]
Use sparingly — prefer external/internal sheets to keep content and presentation separate. [S1]

📖 세부 내용 (Details)

An inline style may be used to apply a unique style for a single element. To use inline styles, add the style attribute to the relevant element. The style attribute can contain any CSS property. [S1]

<!DOCTYPE html>
<html>
<body>

<h1 style="color:blue;text-align:center;">This is a heading</h1>
<p style="color:red;">This is a paragraph.</p>

</body>
</html>

Here the <h1> element is given blue, center-aligned text, and the <p> element is given red text — all directly through their style attributes. [S1]

Tip: An inline style loses many of the advantages of a style sheet (by mixing content with presentation). Use this method sparingly. [S1]

🛠️ 적용 사례 (Applied in summary)

The page's own example applies inline styles to an <h1> (blue, centered) and a <p> (red). No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Inline style via the style attribute (language: HTML):

<h1 style="color:blue;text-align:center;">This is a heading</h1>
<p style="color:red;">This is a paragraph.</p>

⚖️ 비교 및 선택 기준 (Comparison & decision criteria)

Method	How it is added	Best use
External CSS	`<link>` to a `.css` file	Style an entire website from one file [S1]
Internal CSS	`<style>` element in the head	A single page with a unique style [S1]
Inline CSS	`style` attribute on an element	A unique style for a single element; use sparingly [S1]

⚖️ 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 Add External, CSS Add Internal, CSS Multiple Style Sheets
참조 맥락: Referenced when styling one element directly, and as the highest-priority source in the cascade.

📚 출처 (Sources)

[S1] W3Schools — CSS Add Inline — https://www.w3schools.com/css/css_howto_inline.asp

📝 변경 이력 (Change history)

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

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