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title

W3CSS Tabulators

🎯 한 줄 통찰 (One-line insight)

Tabbed navigation has NO dedicated w3-tab* class family at all — it's fully assembled from primitives already covered in earlier chapters (w3-bar/w3-button for the clickable tab strip, plain display:none/display:block toggling for content panels), demonstrating that W3.CSS deliberately favors composing existing utilities over adding single-purpose components for every UI pattern. [S1]

🧠 핵심 개념 (Core concepts)

Same-class content panels — all tab panels share one class (e.g. city), and JS loops over getElementsByClassName to hide all before showing the target one. [S1]
openCity() pattern — the canonical two-step JS: hide everything with the shared class, then set the target element's display to block. [S1]
Active-tab highlighting — mirrors the accordion pattern: loop over elements with a shared tablink class, strip a color class from all, then add it to evt.currentTarget. [S1]
Vertical tabs — swapping the tab strip's container to w3-sidebar w3-bar-block turns horizontal tabs into vertical ones with zero change to the panel-toggling JS. [S1]
Closable tab content — reuses the w3-display-container/w3-display-topright overlay-positioning pattern with an inline onclick="this.parentElement.style.display='none'". [S1]

📖 세부 내용 (Details)

Core toggle function: function openCity(cityName) { var i; var x = document.getElementsByClassName("city"); for (i = 0; i < x.length; i++) { x[i].style.display = "none"; } document.getElementById(cityName).style.display = "block"; }. [S1]
Active-tab color highlighting variant: tablinks[i].className = tablinks[i].className.replace(" w3-red", ""); ... evt.currentTarget.className += " w3-red";. [S1]
Vertical tab strip: <nav class="w3-sidebar w3-bar-block w3-light-grey" style="width:130px"><button class="w3-bar-item w3-button" onclick="openCity(event, 'London')">London</button>...</nav>. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

현재까지 발견된 모순 사항 없음 (No contradictions found in available sources).

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 이미지 갤러리에 탭 전환 로직을 그대로 재사용하는 "Tabbed Image Gallery" 패턴이 openCity() 함수의 범용성을 보여주는 실전 사례다. [S1]

💻 코드 패턴 (Code patterns)

The canonical tab-toggling JavaScript pattern reused throughout the chapter:

function openCity(cityName) {
  var i;
  var x = document.getElementsByClassName("city");
  for (i = 0; i < x.length; i++) {
    x[i].style.display = "none";
  }
  document.getElementById(cityName).style.display = "block";
}

✅ 검증 상태 및 신뢰도

상태: draft
검증 단계: conceptual
출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
신뢰 점수: 0.87
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: W3.CSS Tutorial
관련 개념: W3CSS Sidebar, W3CSS Accordions, W3CSS Pagination
참조 맥락: UI Components 섹션 첫 항목 — 페이지네이션(Pagination) 챕터로 이어짐.

📚 출처 (Sources)

[S1] W3Schools — W3.CSS Navigation Tabs — https://www.w3schools.com/w3css/w3css_tabulators.asp

📝 변경 이력 (Change history)

2026-07-04: Initial draft synthesized from the W3Schools "W3.CSS Navigation Tabs" page (Astra wiki-curation, P-Reinforce v3.1 format).

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