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Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-11 11:05:56 +09:00

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

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 classestopleft, 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):

<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)

📚 출처 (Sources)

📝 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).