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Antigravity Agent e9cbf23ab5 docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

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2026-07-05 00:39:13 +09:00

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title

CSS Background Repeat

🎯 한 줄 통찰 (One-line insight)

By default a background image tiles both vertically and horizontally; background-repeat controls that (repeat-x, repeat-y, no-repeat), and background-position sets where the image starts. [S1]

🧠 핵심 개념 (Core concepts)

Default repetition — by default, a background image is repeated both vertically and horizontally. [S1]
repeat-x — repeats the background image horizontally only. [S1]
repeat-y — repeats the background image vertically only. [S1]
no-repeat — shows the background image only once (no tiling). [S1]
background-position — sets the starting position of the background image; for a non-repeated image this lets you place it (e.g. right top). [S1]

🧩 추출된 패턴 (Extracted patterns)

Single image placement — combine no-repeat with background-position to show one image at a chosen corner. [S1]
Axis-limited tiling — use repeat-x or repeat-y to repeat along one axis only (e.g. a gradient strip across the top). [S1]

📖 세부 내용 (Details)

Default behavior By default, a background image is repeated both vertically and horizontally: [S1]

body {
  background-image: url("gradient_bg.png");
}

background-repeat: repeat-x If the image is repeated only horizontally (repeat-x), the background will look better: [S1]

body {
  background-image: url("gradient_bg.png");
  background-repeat: repeat-x;
}

background-repeat: no-repeat Showing the background image only once is specified by the no-repeat value: [S1]

body {
  background-image: url("img_tree.png");
  background-repeat: no-repeat;
}

background-position The background-position property is used to specify the position of the background image. In the example below, the image is placed in the top-right corner: [S1]

body {
  background-image: url("img_tree.png");
  background-repeat: no-repeat;
  background-position: right top;
}

Property reference (from the page table): [S1]

Property	Purpose
`background-position`	Sets the starting position of a background image
`background-repeat`	Sets how a background image will be repeated

🛠️ 적용 사례 (Applied in summary)

The CSS rules above are the page's own demonstration examples on body. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Tile along one axis (language: CSS):

body {
  background-image: url("gradient_bg.png");
  background-repeat: repeat-x; /* or repeat-y */
}

Single image placed at a corner:

body {
  background-image: url("img_tree.png");
  background-repeat: no-repeat;
  background-position: right top;
}

⚖️ 비교 및 선택 기준 (Comparison & decision criteria)

repeat-x vs repeat-y vs no-repeat — repeat-x tiles horizontally only, repeat-y tiles vertically only, and no-repeat shows the image a single time; choose based on whether the image should fill an axis or appear once. [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: 0.88
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: CSS Tutorial
관련 개념: CSS Background Image, CSS Background Attachment, CSS Background Shorthand, CSS Background Color
참조 맥락: Referenced whenever a background image's tiling or starting position must be controlled.

📚 출처 (Sources)

[S1] W3Schools — CSS Background Repeat — https://www.w3schools.com/css/css_background_repeat.asp

📝 변경 이력 (Change history)

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

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