2nd/10_Wiki/Topic_CSS/CSS_Background_Repeat.md

---
id: css-background-repeat
title: "CSS Background Repeat"
category: "Frontend"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["background-repeat", "repeat-x", "repeat-y", "no-repeat", "background-position", "CSS background tiling"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.88
created_at: 2026-06-23
updated_at: 2026-06-23
review_reason: ""
merge_history: []
tags: ["css", "web", "frontend", "w3schools", "background", "background-repeat"]
raw_sources: ["https://www.w3schools.com/css/css_background_repeat.asp"]
applied_in: []
github_commit: ""
---

# [[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]
```css
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]
```css
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]
```css
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]
```css
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):
```css
body {
  background-image: url("gradient_bg.png");
  background-repeat: repeat-x; /* or repeat-y */
}
```
Single image placed at a corner:
```css
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).