docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합
이전 재구성 작업에서 Dev/ 폴더가 누락되었던 것을 반영. - Dev/Topic_Programming(중첩 폴더, 78개)은 Dev 자체 최상위 폴더들 (Architecture/Conventions/Engineering_Intelligence 등)과 완전 중복이라 제거. - Dev 최상위 엔지니어링 지식 폴더(Architecture/Conventions/Engineering_Intelligence/ Failure_Library/Generalized_Principles/Language/Pattern_Catalog/Platform_Guides/ Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이 존재해 중복 제거(고유 콘텐츠 1개는 예외 처리하여 이동 보존). - Dev의 W3Schools 언어 튜토리얼 폴더(Topic_C/CPP/CSS/CSharp/HOWTO/HTML/Java/ JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동. - 에이전트 운영 상태(.astra/docs)는 그대로 유지, 콘텐츠 폴더만 정리. - Topic_Programming 최종 문서 수: 2784 → 3985.
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Antigravity Agent
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---
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id: css-background-image
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title: "CSS Background Image"
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category: "Frontend"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["background-image", "background image url", "CSS background image", "image background", "url() background"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.88
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created_at: 2026-06-23
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updated_at: 2026-06-23
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review_reason: ""
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merge_history: []
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tags: ["css", "web", "frontend", "w3schools", "background", "image"]
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raw_sources: ["https://www.w3schools.com/css/css_background_image.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[CSS Background Image]]
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## 🎯 한 줄 통찰 (One-line insight)
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The `background-image` property sets an image as the background of an element, and by default the image is repeated so it covers the entire element. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **background-image** — specifies an image to use as the background of an element. [S1]
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- **Default tiling** — by default, the image is repeated so it covers the entire element. [S1]
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- **Image source** — the image is referenced with the `url()` function (e.g. `url("paper.gif")`). [S1]
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- **Applies to any element** — a background image can be set on the whole page (`body`) or on a specific element such as a paragraph. [S1]
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- **Readability matters** — when using a background image, use an image that does not disturb the text. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Page-wide vs element-scoped** — set `background-image` on `body` for the entire page, or on a specific selector (e.g. `p`) to scope it to that element. [S1]
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- **Contrast check** — choose an image that keeps the overlaid text readable; busy images make text "hardly readable." [S1]
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## 📖 세부 내용 (Details)
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**Background Image**
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The `background-image` property specifies an image to use as the background of an element. By default, the image is repeated so it covers the entire element. [S1]
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The background image for a page can be set like this: [S1]
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```css
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body {
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background-image: url("paper.gif");
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}
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```
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> Note: When using a background image, use an image that does not disturb the text. The page shows a counter-example where a busy image makes "the text is hardly readable": [S1]
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```css
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body {
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background-image: url("bgdesert.jpg");
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}
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```
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The background image can also be set for specific elements, like the `<p>` element: [S1]
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```css
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p {
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background-image: url("paper.gif");
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}
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```
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The page's property reference table lists `background-image`, described as the property that sets the background image for an element. [S1]
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## 🛠️ 적용 사례 (Applied in summary)
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The CSS rules above are the page's own demonstration examples for `body` and `p`. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Page background image (language: CSS):
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```css
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body {
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background-image: url("paper.gif");
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}
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```
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Element-scoped background image:
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```css
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p {
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background-image: url("paper.gif");
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}
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```
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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No contradictions found in the source.
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.88
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[CSS Tutorial]]
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- **관련 개념:** [[CSS Background Repeat]], [[CSS Background Attachment]], [[CSS Background Shorthand]], [[CSS Background Color]]
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- **참조 맥락:** Referenced whenever an image is placed behind page or element content; pairs with background-repeat and background-position to control its tiling and placement.
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## 📚 출처 (Sources)
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- [S1] W3Schools — CSS Background Image — https://www.w3schools.com/css/css_background_image.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Background Image" page (Astra wiki-curation, P-Reinforce v3.1 format).
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