2nd/10_Wiki/Topic_CSS/CSS_Vertical_Navbar.md

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
css-vertical-navbar	CSS Vertical Navbar	Frontend	draft	conceptual		vertical navbar sidenav sidebar navigation vertical navigation bar full-height sidebar		B	0.87	2026-06-23	2026-06-23			css web frontend w3schools navbar navigation	https://www.w3schools.com/css/css_navbar_vertical.asp

CSS Vertical Navbar

🎯 한 줄 통찰 (One-line insight)

A vertical navbar is built by making the link <a> elements display: block inside a fixed-width <ul>, then layering on hover, active, centered, and full-height fixed-sidebar variations. [S1]

🧠 핵심 개념 (Core concepts)

• Block links — setting display: block on li a makes the whole link area clickable and stacks links vertically. [S1]
• Fixed width — the <ul> is given an explicit width (e.g. 200px). [S1]
• Hover state — li a:hover changes link background and text color. [S1]
• Active state — an .active class highlights the current link. [S1]
• Full-height sidebar — height: 100% + position: fixed makes the navbar a sticky, scrollable sidebar. [S1]

🧩 추출된 패턴 (Extracted patterns)

• Block-link vertical stack — fixed-width ul + display: block links is the core vertical pattern. [S1]
• Centered bordered list — text-align: center with border-bottom per li and li:last-child { border-bottom: none; } removes the trailing divider. [S1]
• Fixed full-height sidenav — position: fixed; height: 100%; overflow: auto; for a scrollable sidebar. [S1]

📖 세부 내용 (Details)

Basic vertical navbar with hover [S1]

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  width: 200px;
  background-color: #f1f1f1;
}

li a {
  display: block;
  color: black;
  padding: 8px 16px;
  text-decoration: none;
}

/* Change the link and background color on hover */
li a:hover {
  background-color: #555555;
  color: white;
}

Active link [S1] Add an active class to highlight the current link:

.active {
  background-color: #04AA6D;
  color: white;
}

Centered links with borders [S1]

ul {
  border: 1px solid #555555;
}

li {
  text-align: center;
  border-bottom: 1px solid #555555;
}

li:last-child {
  border-bottom: none;
}

Full-height fixed sidebar [S1]

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  width: 130px;
  background-color: #f1f1f1;
  height: 100%; /* Full height */
  position: fixed; /* Make it stick, even on scroll */
  overflow: auto; /* Enable scrolling if the sidenav has too much content */
}

Note [S1] The fixed sidebar example might not work properly on mobile devices.

🛠️ 적용 사례 (Applied in summary)

The page's applied examples are the gray hover navbar, the green .active highlight, the centered bordered list with no trailing divider, and the fixed full-height scrollable sidebar. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Block-link vertical navbar (language: CSS):

li a {
  display: block;
  color: black;
  padding: 8px 16px;
  text-decoration: none;
}

li a:hover {
  background-color: #555555;
  color: white;
}

Fixed full-height sidebar (language: CSS):

ul {
  width: 130px;
  height: 100%;
  position: fixed;
  overflow: auto;
}

⚖️ 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: 0.87
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: CSS Tutorial
• 관련 개념: CSS Navigation Bar, CSS Horizontal Navbar, CSS Position
• 참조 맥락: Referenced when building a sidebar or vertically stacked navigation menu.

📚 출처 (Sources)

• [S1] W3Schools — CSS Vertical Navbar — https://www.w3schools.com/css/css_navbar_vertical.asp

📝 변경 이력 (Change history)

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