---
id: howto-css-notification-button
title: "How To - Notification Buttons"
category: "Web_Recipes"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["badge count button CSS"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.82
created_at: 2026-07-04
updated_at: 2026-07-04
review_reason: ""
merge_history: []
tags: ["howto", "css", "w3schools", "buttons", "badge"]
raw_sources: ["https://www.w3schools.com/howto/howto_css_notification_button.asp"]
applied_in: []
github_commit: ""
---

# [[HOWTO CSS Notification Button]]

## 🎯 한 줄 통찰 (One-line insight)
The count badge is positioned with NEGATIVE offsets (`top: -10px; right: -10px;`) rather than the usual `0`/positive values seen in other absolute-positioning recipes — this deliberately pushes the badge PARTLY OUTSIDE the parent button's boundary box, creating the familiar "peeking over the corner" notification-count look, which only works because `.notification { position: relative; }` gives the badge a positioning anchor to escape from in the first place. [S1]

## 🧠 핵심 개념 (Core concepts)
- **`position: relative` on the button** — establishes the anchor for the badge's absolute positioning, same relative/absolute pairing seen throughout this cookbook. [S1]
- **Negative `top`/`right` offsets** — `top: -10px; right: -10px;` deliberately pushes the badge outside the button's own box, rather than flush against an inner edge. [S1]
- **`border-radius: 50%` badge** — combined with roughly-equal padding to render as a circle around the count number. [S1]

## 📖 세부 내용 (Details)
- `.notification { background-color: #555; position: relative; display: inline-block; } .notification .badge { position: absolute; top: -10px; right: -10px; border-radius: 50%; background: red; color: white; }`. [S1]

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

## 🛠️ 적용 사례 (Applied in summary)
"Inbox" 버튼 오른쪽 상단 모서리에 빨간 원형 배지로 "3"을 표시하는 예제가 원문에서 직접 제시됨. [S1]

## 💻 코드 패턴 (Code patterns)
Notification badge escaping the button's own box via negative offsets (CSS):
```css
.notification { position: relative; display: inline-block; }
.notification .badge {
  position: absolute;
  top: -10px; right: -10px; /* negative -- pushes outside the button */
  border-radius: 50%;
  background: red;
  color: white;
}
```

## ✅ 검증 상태 및 신뢰도
- **상태:** draft
- **검증 단계:** conceptual
- **출처 신뢰도:** B (W3Schools — widely used educational reference)
- **신뢰 점수:** 0.82
- **중복 검사 결과:** 신규 생성 (New discovery)

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

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

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