2nd/10_Wiki/Topic_CSS/CSS_Custom_Fonts.md

id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit

id	title	category	status	verification_status	canonical_id	aliases	duplicate_of	source_trust_level	confidence_score	created_at	updated_at	review_reason	merge_history	tags	raw_sources	applied_in	github_commit
css-custom-fonts	CSS Custom Fonts	Frontend	draft	conceptual		@font-face web fonts CSS custom fonts font-face rule WOFF fonts		B	0.87	2026-06-23	2026-06-23			css web frontend w3schools fonts font-face typography	https://www.w3schools.com/css/css3_fonts.asp

CSS Custom Fonts

🎯 한 줄 통찰 (One-line insight)

The CSS @font-face rule lets you define and load custom (web) fonts so a page can use a typeface without it being installed on the visitor's computer — the font file downloads automatically when needed. [S1]

🧠 핵심 개념 (Core concepts)

• @font-face defines and loads custom fonts — it allows you to define and load custom fonts for use on a webpage. [S1]
• No local installation required — the font does not need to be installed on the user's computer; it downloads automatically when needed. [S1]
• Two required descriptors — font-family (the font name you choose) and src (the URL of the font file). [S1]
• Weight variants need their own rule — to support bold, define an additional @font-face rule with font-weight: bold; pointing at the bold font file. [S1]
• Web-optimized formats exist — WOFF and WOFF2 (Web Open Font Format) are optimized for web use and broadly supported; TTF/OTF are popular for desktop but are not web-optimized. [S1]

🧩 추출된 패턴 (Extracted patterns)

• Define-then-use pattern — declare a font with @font-face { font-family; src; }, then reference that name in a selector's font-family. [S1]
• Weight-variant pattern — add a second @font-face with font-weight: bold; and a bold font file. [S1]

📖 세부 내용 (Details)

The CSS @font-face Rule [S1] The CSS @font-face rule allows you to define and load custom fonts for use on a webpage. The font does not need to be installed on the user's computer; it downloads automatically when needed.

Basic custom font example [S1] In the @font-face rule, first define a name for the font (e.g. myFont) and then point to the font file. To use the font for an HTML element, refer to the font name through the font-family property:

@font-face {
  font-family: myFont;
  src: url(sansation_light.woff);
}

p {
  font-family: myFont;
}

Using bold text with @font-face [S1] You must add another @font-face rule containing descriptors for bold text. The src property points to a different (bold) font file, and font-weight: bold; ties it to bold usage:

@font-face {
  font-family: myFont;
  src: url(sansation_bold.woff);
  font-weight: bold;
}

This way the browser uses the specific bold font file whenever bold text of myFont is requested.

Font formats [S1]

• WOFF / WOFF2 (Web Open Font Format) — optimize file size for web use, developed in 2009, have W3C Recommendation status, and are supported across all major browsers.
• TTF (TrueType Fonts) — emerged in the late 1980s via Apple; popular for desktop use but not web-optimized.
• OTF (OpenType Fonts) — developed by Apple and Microsoft as an advanced, scalable format; popular for desktop use but not web-optimized.

CSS @font-face Descriptors table [S1]

Descriptor	Description
font-family	Required; defines the font name
src	Required; defines the URL of the font file
font-stretch	Optional; default normal
font-style	Optional; default normal
font-weight	Optional; default normal
font-display	Optional; default auto
unicode-range	Optional; default U+0-10FFFF

🛠️ 적용 사례 (Applied in summary)

The page's own demonstrations (defining myFont via @font-face and applying it to p, plus the bold variant) serve as the applied examples. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Define and use a custom font (language: CSS):

@font-face {
  font-family: myFont;
  src: url(sansation_light.woff);
}

p {
  font-family: myFont;
}

Add a bold variant:

@font-face {
  font-family: myFont;
  src: url(sansation_bold.woff);
  font-weight: bold;
}

⚖️ 비교 및 선택 기준 (Comparison & decision criteria)

• WOFF/WOFF2 vs TTF/OTF — WOFF and WOFF2 are optimized for the web (smaller files, W3C Recommendation, broad browser support); TTF and OTF are popular for desktop use but are not web-optimized. Prefer WOFF/WOFF2 for the src of web fonts. [S1]
• Regular vs bold — a single @font-face covers the regular weight; declare a separate @font-face with font-weight: bold; to load a dedicated bold file. [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: 0.87
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: CSS Tutorial
• 관련 개념: CSS Text Effects, CSS Text Shadow Effects, CSS Box Shadow
• 참조 맥락: Referenced when loading a brand or non-system typeface so it renders consistently regardless of the visitor's installed fonts.

📚 출처 (Sources)

• [S1] W3Schools — CSS Custom Fonts — https://www.w3schools.com/css/css3_fonts.asp

📝 변경 이력 (Change history)

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