---
id: howto-css-alert-buttons
title: "How To - Alert Buttons"
category: "Web_Recipes"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["success info warning danger buttons"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.83
created_at: 2026-07-04
updated_at: 2026-07-04
review_reason: ""
merge_history: []
tags: ["howto", "css", "w3schools", "buttons"]
raw_sources: ["https://www.w3schools.com/howto/howto_css_alert_buttons.asp"]
applied_in: []
github_commit: ""
---

# [[HOWTO CSS Alert Buttons]]

## 🎯 한 줄 통찰 (One-line insight)
A shared `.btn` base class handles all the STRUCTURAL styling (border removal, padding, cursor) once, while five separate semantic modifier classes (`.success`, `.info`, `.warning`, `.danger`, `.default`) each carry ONLY a background-color pair (normal + `:hover`) — this base+modifier split means adding a sixth alert color later requires just one new 2-line modifier class, not a full button redefinition. [S1]

## 🧠 핵심 개념 (Core concepts)
- **Shared base class `.btn`** — `border: none; color: white; padding: 14px 28px; cursor: pointer;` applied once to every alert button. [S1]
- **Color-coded semantic modifiers** — `.success` (green), `.info` (blue), `.warning` (orange), `.danger` (red), `.default` (gray, with black text instead of white). [S1]
- **Each modifier defines its own `:hover`** — a slightly darker shade of the same hue, applied consistently across all five variants. [S1]

## 📖 세부 내용 (Details)
- HTML: `<button class="btn success">Success</button>` (and similarly for info/warning/danger/default). [S1]
- CSS colors: success `#04AA6D`→hover `#46a049`; info `#2196F3`→hover `#0b7dda`; warning `#ff9800`→hover `#e68a00`; danger `#f44336`→hover `#da190b`; default `#e7e7e7` (black text)→hover `#ddd`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
없음 — 신규 레시피, 기존 문서와 모순되는 내용 없음.

## 🛠️ 적용 사례 (Applied in summary)
Success/Info/Warning/Danger/Default 5가지 색상의 알림 버튼을 하나의 공통 .btn 클래스와 색상별 수식 클래스로 구현하는 예제가 원문에서 직접 제시됨. [S1]

## 💻 코드 패턴 (Code patterns)
Base class + semantic color modifiers (CSS):
```css
.btn {
  border: none;
  color: white;
  padding: 14px 28px;
  cursor: pointer;
}
.success { background-color: #04AA6D; }
.success:hover { background-color: #46a049; }
.danger { background-color: #f44336; }
.danger:hover { background-color: #da190b; }
```

## ✅ 검증 상태 및 신뢰도
- **상태:** draft
- **검증 단계:** conceptual
- **출처 신뢰도:** B (W3Schools — widely used educational reference)
- **신뢰 점수:** 0.83
- **중복 검사 결과:** 신규 생성 (New discovery)

## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[W3Schools HOW TO]]
- **관련 개념:** [[HOWTO CSS Block Buttons]], [[HOWTO CSS Outline Buttons]], [[HOWTO CSS Text Buttons]]
- **참조 맥락:** CSS Buttons 섹션.

## 📚 출처 (Sources)
- [S1] W3Schools — How To - Alert Buttons — https://www.w3schools.com/howto/howto_css_alert_buttons.asp

## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "How To - Alert Buttons" recipe (Astra wiki-curation, P-Reinforce v3.1 format).