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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+---
+id: css-object-position
+title: "CSS object-position"
+category: "Frontend"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["object-position", "image positioning", "x/y image position", "object-fit position", "content box position"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.89
+created_at: 2026-06-23
+updated_at: 2026-06-23
+review_reason: ""
+merge_history: []
+tags: ["css", "web", "frontend", "w3schools", "object-position", "images", "video"]
+raw_sources: ["https://www.w3schools.com/css/css3_object-position.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[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]
+```css
+.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]
+```css
+.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):
+```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).