2nd/10_Wiki/Topic_CSS/CSS_Math_Functions.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-math-functions	CSS Math Functions	Frontend	draft	conceptual		calc() min() max() clamp() CSS calc responsive sizing functions		B	0.9	2026-06-23	2026-06-23			css web frontend w3schools math-functions calc responsive	https://www.w3schools.com/css/css_math_functions.asp

CSS Math Functions

🎯 한 줄 통찰 (One-line insight)

CSS math functions — calc(), max(), min(), and clamp() — let property values be computed (and mixed across units) at render time, enabling responsive sizing without JavaScript. [S1]

🧠 핵심 개념 (Core concepts)

• calc() — performs a mathematical calculation that will be used as the property value, supporting mixed units. [S1]
• max() — takes a comma-separated list of values and uses the largest value from the list as the property value. [S1]
• min() — takes a comma-separated list of values and uses the smallest value from the list as the property value. [S1]
• clamp() — sets a value that adjusts responsively between a minimum, a preferred, and a maximum value depending on the size of the viewport. [S1]

🧩 추출된 패턴 (Extracted patterns)

• Mixed-unit arithmetic — calc() combines incompatible units such as %, px, and vh in one expression (e.g. calc(100% - 100px)). [S1]
• Responsive clamp pattern — clamp(min, preferred, max) with a viewport-relative preferred value (e.g. clamp(1.5rem, 5vw, 3rem)) produces fluid typography and widths bounded at both ends. [S1]

📖 세부 내용 (Details)

calc() — perform a calculation. The calc() function performs a mathematical calculation that will be used as the property value. It supports addition, subtraction, multiplication, and division with mixed units. [S1]

#div1 {
  margin: auto;
  width: calc(100% - 100px);
  height: calc(30vh + 50px);
  border: 1px solid black;
  padding: 10px;
}

max() — use the largest value. The max() function takes a comma-separated list of values, and uses the largest value from the list as the property value. [S1]

#div1 {
  height: 100px;
  width: max(50%, 300px);
  border: 1px solid black;
  padding: 10px;
}

min() — use the smallest value. The min() function takes a comma-separated list of values, and uses the smallest value from the list as the property value. [S1]

#div1 {
  height: 100px;
  width: min(50%, 300px);
  border: 1px solid black;
  padding: 10px;
}

clamp() — responsive bounded value. The clamp() function is used to set a value that will adjust responsively between a minimum value, a preferred value, and a maximum value depending on the size of the viewport. [S1]

h2 {
  font-size: clamp(1.5rem, 5vw, 3rem);
}

div {
  border: 1px solid green;
  padding: 10px;
  font-size: clamp(1rem, 2.5vw, 2rem);
  width: clamp(200px, 50%, 600px);
}

🛠️ 적용 사례 (Applied in summary)

The page's applied demonstrations style a #div1 box (and a clamp()-based heading/div pair) to show each function computing a live property value — for example a width that is the viewport minus 100px, or a font-size that scales with 5vw but never below 1.5rem or above 3rem. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Mixed-unit calculation (language: CSS):

width: calc(100% - 100px);
height: calc(30vh + 50px);

Clamp for fluid, bounded sizing (language: CSS):

font-size: clamp(1.5rem, 5vw, 3rem);
width: clamp(200px, 50%, 600px);

⚖️ 비교 및 선택 기준 (Comparison & decision criteria)

• calc() — when you need an exact arithmetic expression mixing units (e.g. fill the viewport minus a fixed sidebar). [S1]
• max() — when you want a floor: never smaller than the largest of the listed values. [S1]
• min() — when you want a ceiling: never larger than the smallest of the listed values. [S1]
• clamp() — when you want both a floor and a ceiling around a fluid preferred value in one declaration. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

No contradictions found in the source. (Note: the source page spells "preferred" as "preffered" in its clamp() description; corrected here.) [S1]

✅ 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: 0.9
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: CSS Tutorial
• 관련 개념: CSS Units, CSS Website Layout, CSS Optimization
• 참조 맥락: Used whenever a property value must be computed or made responsive across viewport sizes without scripting.

📚 출처 (Sources)

• [S1] W3Schools — CSS Math Functions — https://www.w3schools.com/css/css_math_functions.asp

📝 변경 이력 (Change history)

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