---
id: howto-css-block-buttons
title: "How To - Full Width (Block) Buttons"
category: "Web_Recipes"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["full width button CSS"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.78
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_block_buttons.asp"]
applied_in: []
github_commit: ""
---

# [[HOWTO CSS Block Buttons]]

## 🎯 한 줄 통찰 (One-line insight)
A `<button>` is inline-block by default, so `width: 100%` alone does nothing until `display: block` is also set — this is the same "unconstrained-vs-constrained-width" dependency seen in `[[HOWTO CSS Center Website]]`'s `margin: auto`, just from the opposite direction: there, the element needed a WIDTH LIMIT to leave room for centering; here, the button needs its DISPLAY TYPE changed before a width percentage can have any visual effect on an inherently content-sized element. [S1]

## 🧠 핵심 개념 (Core concepts)
- **`display: block` + `width: 100%`** — both required together; a button (default `inline-block`) won't stretch to `100%` width without first becoming a block-level element. [S1]

## 📖 세부 내용 (Details)
- `.block { display: block; width: 100%; border: none; padding: 14px 28px; text-align: center; }`. [S1]

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

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 컨테이너 전체 폭을 차지하는 버튼 하나의 최소 예제가 원문에서 제시됨. [S1]

## 💻 코드 패턴 (Code patterns)
Block button — requires both display:block AND width:100% (CSS):
```css
.block {
  display: block;
  width: 100%;
  border: none;
  padding: 14px 28px;
  text-align: center;
}
```

## ✅ 검증 상태 및 신뢰도
- **상태:** draft
- **검증 단계:** conceptual
- **출처 신뢰도:** B (W3Schools — widely used educational reference)
- **신뢰 점수:** 0.78
- **중복 검사 결과:** 신규 생성 (New discovery)

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

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

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