---
id: w3css-display
title: "W3CSS Display"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["w3-display-container", "positioning classes", "W3.CSS 디스플레이 위치"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.89
created_at: 2026-07-04
updated_at: 2026-07-04
review_reason: ""
merge_history: []
tags: ["w3css", "css-framework", "w3schools", "display", "positioning"]
raw_sources: ["https://www.w3schools.com/w3css/w3css_display.asp"]
applied_in: []
github_commit: ""
---

# [[W3CSS Display]]

## 🎯 한 줄 통찰 (One-line insight)
The nine `w3-display-*` position classes only work as children of a `w3-display-container` — text placed inside an `<img>`'s wrapping container using `w3-display-topleft`/`w3-display-bottomright`/etc. can even simulate a flag graphic purely from four colored positioned blocks, showing the position system is really absolute positioning against one specific parent, not a general-purpose overlay tool. [S1]

## 🧠 핵심 개념 (Core concepts)
- **`w3-display-container`** — the required parent wrapper for all `w3-display-*` position classes. [S1]
- **9 position classes** — `topleft`, `topright`, `bottomleft`, `bottomright`, `left`, `right`, `middle`, `topmiddle`, `bottommiddle`. [S1]
- **`w3-display-hover`** — content stays hidden until the container is hovered, then appears — combinable with effect/animation classes for interactive overlays. [S1]
- **`w3-left` / `w3-right`** — CSS float shortcuts (not the same as `w3-display-left`/`right`, which are absolute-position within a display-container). [S1]
- **`w3-show` / `w3-hide`** — force `display:block`/`display:none`, often used to toggle visibility via JS. [S1]
- **`w3-mobile`** — makes an element `display:block; width:100%` specifically on screens under 600px wide. [S1]

## 📖 세부 내용 (Details)
- Text over an image using all 9 positions: `<div class="w3-display-container"><img src="img_lights.jpg" style="width:100%"><div class="w3-padding w3-display-topleft">Top Left</div>...</div>`. [S1]
- Hover-reveal overlay: `<div class="w3-display-container w3-hover-opacity"><img src="img_avatar.png"><div class="w3-display-middle w3-display-hover"><button class="w3-button w3-black">John Doe</button></div></div>`. [S1]
- Flag simulation via 4 positioned colored blocks: `<div class="w3-display-container w3-card-4" style="height:200px;width:350px"><div class="w3-red w3-display-topleft" style="width:25%;height:40%"></div><div class="w3-red w3-display-topright" style="width:60%;height:40%"></div>...</div>`. [S1]
- Floating (distinct mechanism from display-position): `<div class="w3-bar w3-light-grey"><div class="w3-left w3-red">w3-left</div><div class="w3-right w3-blue">w3-right</div></div>` — note: `w3-container` auto-clears floats. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
- **position 클래스는 반드시 컨테이너 필요**: w3-display-* 클래스는 w3-display-container 부모 없이는 동작하지 않는다는 점이 구조적 전제로 강조됨. [S1]

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 이미지 위에 9방향 텍스트 라벨을 배치하거나, 4개의 색 블록으로 국기를 시뮬레이션하는 것이 절대 위치 지정의 창의적 활용 사례다. [S1]

## 💻 코드 패턴 (Code patterns)
Simulating a flag with four positioned colored blocks (HTML):
```html
<div class="w3-display-container w3-card-4" style="height:200px;width:350px">
  <div class="w3-red w3-display-topleft" style="width:25%;height:40%"></div>
  <div class="w3-red w3-display-topright" style="width:60%;height:40%"></div>
  <div class="w3-red w3-display-bottomleft" style="width:25%;height:40%"></div>
  <div class="w3-red w3-display-bottomright" style="width:60%;height:40%"></div>
</div>
```

## ✅ 검증 상태 및 신뢰도
- **상태:** draft
- **검증 단계:** conceptual
- **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:** [[W3.CSS Tutorial]]
- **관련 개념:** [[W3CSS RTL]], [[W3CSS Buttons]], [[W3CSS Effects]]
- **참조 맥락:** Spacing & Layout 섹션의 마지막 — 버튼(Buttons) 챕터로 이어짐.

## 📚 출처 (Sources)
- [S1] W3Schools — W3.CSS Display — https://www.w3schools.com/w3css/w3css_display.asp

## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "W3.CSS Display" page (Astra wiki-curation, P-Reinforce v3.1 format).