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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 Text Pseudo-elements

🎯 한 줄 통찰 (One-line insight)

The text pseudo-elements ::first-line and ::first-letter style just the opening line or opening letter of block-level text, and can be combined with classes and with each other. [S1]

🧠 핵심 개념 (Core concepts)

::first-line — styles the first line of text; can only be applied to block-level elements. [S1]
::first-letter — styles the first letter of text; can only be applied to block-level elements. [S1]
Works with classes — pseudo-elements can be combined with HTML classes (e.g. p.intro::first-letter). [S1]
Combinable — ::first-line and ::first-letter can both be applied to the same element. [S1]

🧩 추출된 패턴 (Extracted patterns)

Drop-cap pattern — ::first-letter with an enlarged font size produces a drop-cap-style opening letter. [S1]
Class-scoped pseudo-element — selector.class::first-letter limits the effect to a specific subset of elements. [S1]
Stacking pseudo-elements — applying both ::first-letter and ::first-line to one selector layers two styles on the same paragraph. [S1]

📖 세부 내용 (Details)

The ::first-line pseudo-element [S1] The ::first-line pseudo-element is used to style the first line of text. It can only be applied to block-level elements.

p::first-line {
  color: red;
  font-variant: small-caps;
  font-size: 19px;
}

The ::first-letter pseudo-element [S1] The ::first-letter pseudo-element is used to style the first letter of text. Like ::first-line, it can only be applied to block-level elements.

p::first-letter {
  color: red;
  font-size: xx-large;
}

Combining with a class [S1] Pseudo-elements can be combined with HTML classes:

p.intro::first-letter {
  color: #ff0000;
  font-size: 200%;
}

Multiple pseudo-elements on one selector [S1] Several pseudo-elements can be combined:

p::first-letter {
  color: red;
  font-size: xx-large;
}

p::first-line {
  color: blue;
  font-variant: small-caps;
}

🛠️ 적용 사례 (Applied in summary)

The page's applied examples are the red small-caps first line, the enlarged red first letter, the .intro class drop cap, and the stacked first-letter + first-line styling. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

First-line styling (language: CSS):

p::first-line {
  color: red;
  font-variant: small-caps;
  font-size: 19px;
}

Drop-cap first letter (language: CSS):

p::first-letter {
  color: red;
  font-size: xx-large;
}

⚖️ 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: 0.87
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: CSS Tutorial
관련 개념: CSS Pseudo-elements, CSS Content Pseudo-elements, CSS Text
참조 맥락: Referenced when styling the opening line or letter of paragraphs, e.g. drop caps.

📚 출처 (Sources)

[S1] W3Schools — CSS Text Pseudo-elements — https://www.w3schools.com/css/css_pseudo_elements_text.asp

📝 변경 이력 (Change history)

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

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