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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 object-position

🎯 한 줄 통찰 (One-line insight)

The CSS object-position property is used together with object-fit to specify how an <img> or <video> should be positioned with x/y coordinates within its container. [S1]

🧠 핵심 개념 (Core concepts)

Purpose — object-position positions an <img> or <video> with x/y coordinates within its container, used together with object-fit. [S1]
First value = x-axis, second value = y-axis. [S1]
Value forms — strings (left, center, right) or numbers (px or %). [S1]
Negative values are permitted. [S1]

🧩 추출된 패턴 (Extracted patterns)

Reframe a cropped image — when object-fit: cover; crops an image, use object-position to choose which part of the image stays visible. [S1]
x/y pair — supply two values: the first shifts horizontally, the second shifts vertically. [S1]

📖 세부 내용 (Details)

What it does — The CSS object-position property is used together with the object-fit property to specify how an <img> or <video> should be positioned with x/y coordinates within its container. [S1]

The first value controls the x-axis and the second value controls the y-axis. Values can be strings (left, center, right) or numbers (px or %), and negative values are allowed. [S1]

Example 1 — position to center a building [S1]

.image-container {
  width: 200px;
  height: 300px;
  border: 1px solid black;
}

.image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 80% 100%;
}

Example 2 — reposition to center the Eiffel Tower [S1]

.image-container {
  width: 200px;
  height: 300px;
  border: 1px solid black;
}

.image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 15% 100%;
}

Related properties [S1]

Property	Description
`object-fit`	Specifies how an `<img>` or `<video>` should be resized to fit its container
`object-position`	Specifies how an `<img>` or `<video>` should be positioned with x/y coordinates inside its "own content box"

🛠️ 적용 사례 (Applied in summary)

The page's own examples are the applied cases: a cropped (object-fit: cover) image re-framed via object-position: 80% 100% and object-position: 15% 100% to keep different subjects in view. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Re-frame a cover-cropped image with x/y coordinates (language: CSS):

.image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 80% 100%;
}

⚖️ 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 Object Fit, CSS Image Shapes, CSS Images
참조 맥락: Referenced when an object-fit: cover crop hides the important subject and must be re-framed.

📚 출처 (Sources)

[S1] W3Schools — CSS object-position — https://www.w3schools.com/css/css3_object-position.asp

📝 변경 이력 (Change history)

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

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