2nd/10_Wiki/Topic_CSS/CSS_Buttons_Groups.md

---
id: css-button-groups
title: "CSS Button Groups"
category: "Frontend"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["button group", "btn-group", "horizontal button group", "vertical button group", "bordered button group", "flex buttons"]
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", "buttons", "flexbox", "ui"]
raw_sources: ["https://www.w3schools.com/css/css3_buttons_groups.asp"]
applied_in: []
github_commit: ""
---

# [[CSS Button Groups]]

## 🎯 한 줄 통찰 (One-line insight)
A button group is just a set of buttons wrapped in a `<div>` that becomes a flex container — `display: flex` lays them out, `flex-wrap` lets them break to a new line, and `flex-direction: column` stacks them vertically. [S1]

## 🧠 핵심 개념 (Core concepts)
- **Container = flex** — to create a group of buttons, wrap the buttons in a `<div>` element and add `display: flex;` to that `<div>`. [S1]
- **Responsive wrapping** — add `flex-wrap: wrap;` so the buttons wrap onto a new line on small screens. [S1]
- **Horizontal vs vertical** — the default flex direction is horizontal; add `flex-direction: column;` to display the buttons vertically. [S1]
- **Bordered grouping** — use the `border` property to create a bordered button group, and remove the duplicated inner border so adjacent buttons share one line. [S1]

## 🧩 추출된 패턴 (Extracted patterns)
- **Wrap-and-flex pattern** — `.btn-group { display: flex; }` over a set of `.button` children produces an aligned group without per-button positioning. [S1]
- **Collapse duplicate borders** — `.btn-group .button:not(:last-child) { border-right: none; }` removes the doubled border between adjacent bordered buttons so the group reads as one bar. [S1]
- **Direction switch** — the same markup becomes a vertical group purely by setting `flex-direction: column;` on the container. [S1]

## 📖 세부 내용 (Details)
**CSS Horizontal Button Group** [S1]
To create a group of buttons, wrap the buttons in a `<div>` element, and add `display: flex;` to the `<div>` element. Also add `flex-wrap: wrap;`, to let the buttons wrap on a new line on small screens:
```css
.btn-group {
  display: flex;
  flex-wrap: wrap;
}

.button {
  background-color: #04AA6D;
  border: none;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  font-size: 16px;
  cursor: pointer;
}

.btn-group .button:hover {
  background-color: dodgerblue;
}
```

**CSS Bordered Button Group** [S1]
Use the `border` property to create a bordered button group:
```css
.button {
  border: 1px solid green;
}

.btn-group .button:not(:last-child) {
  border-right: none;
}
```

**CSS Vertical Button Group** [S1]
To create a vertical button group, wrap the buttons in a `<div>` element, and add `display: flex;` to the `<div>` element. Also add `flex-direction: column;`, to let the buttons be displayed in a vertical way:
```css
.btn-group {
  display: flex;
  flex-direction: column;
}
```

**CSS Animated Buttons** [S1]
The source page presents an "CSS Animated Buttons" section with four labelled examples — "Add an arrow on hover", "Add a 'pressed' effect on click", "Fade in on hover", and "Add a 'ripple' effect on click". The CSS source for these four examples is only offered behind "Try it Yourself" interactive links and is not present as text on the page.

> Code for the four animated-button examples: Not found in source.

## 🛠️ 적용 사례 (Applied in summary)
The page's own examples are the applied cases: a horizontal `.btn-group` of `.button` elements, a bordered variant collapsing the shared border, and a vertical variant. No external project/commit applications found in the source.

## 💻 코드 패턴 (Code patterns)
Horizontal group container (language: CSS):
```css
.btn-group {
  display: flex;
  flex-wrap: wrap;
}
```
Vertical group container (language: CSS):
```css
.btn-group {
  display: flex;
  flex-direction: column;
}
```
Collapse the inner border (language: CSS):
```css
.btn-group .button:not(:last-child) {
  border-right: none;
}
```

## ⚖️ 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 Buttons]], [[CSS Flexbox]], [[CSS Borders]], [[CSS Pagination]]
- **참조 맥락:** Referenced when grouping related actions (toolbars, segmented controls) into a single visual unit.

## 📚 출처 (Sources)
- [S1] W3Schools — CSS Button Groups — https://www.w3schools.com/css/css3_buttons_groups.asp

## 📝 변경 이력 (Change history)
- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Button Groups" page (Astra wiki-curation, P-Reinforce v3.1 format).