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73 lines
3.8 KiB
Markdown
73 lines
3.8 KiB
Markdown
---
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id: w3css-input
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title: "W3CSS Input"
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category: "Programming_Language"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["w3-input", "w3-check", "w3-radio", "W3.CSS 입력 폼"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.89
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created_at: 2026-07-04
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updated_at: 2026-07-04
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review_reason: ""
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merge_history: []
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tags: ["w3css", "css-framework", "w3schools", "forms", "input"]
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raw_sources: ["https://www.w3schools.com/w3css/w3css_input.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[W3CSS Input]]
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## 🎯 한 줄 통찰 (One-line insight)
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`w3-input` has a bottom border by DEFAULT — the source frames "borderless" as the exception requiring an explicit `w3-border-0` override, meaning W3.CSS's baked-in visual assumption is that text inputs should look like underlined fields (Material Design style) unless you deliberately opt out. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **`w3-input`** — text input styling; has a bottom border BY DEFAULT (add `w3-border-0` to remove it, or `w3-border` for a full border). [S1]
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- **`w3-animate-input`** — expands the input to 100% width specifically ON FOCUS (not permanently). [S1]
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- **`w3-check`** — checkbox styling. [S1]
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- **`w3-radio`** — radio button styling. [S1]
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- **`w3-select`** — dropdown/select styling. [S1]
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- **Label placement is purely structural** — "Top Labels" vs. "Bottom Labels" is just whether the `<label>` markup comes before or after the `<input>` in HTML order — no different classes involved. [S1]
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- **Responsive Grid for form layout** — `w3-row-padding` + `w3-third`/`w3-half` lets multiple inputs sit on one row, stacking on small screens. [S1]
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## 📖 세부 내용 (Details)
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- Default bottom-border input: `<input class="w3-input" type="text">`. [S1]
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- Borderless variant: `<input class="w3-input w3-border-0" type="text">`. [S1]
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- Focus-expanding input: `<input class="w3-input w3-animate-input" type="text" style="width:30%">`. [S1]
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- Checkbox with disabled state: `<input class="w3-check" type="checkbox" checked="checked"> <label>Milk</label> <input class="w3-check" type="checkbox" disabled> <label>Lemon (Disabled)</label>`. [S1]
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- Radio group: `<input class="w3-radio" type="radio" name="gender" value="male" checked> <label>Male</label>`. [S1]
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- Grid-based form layout: `<div class="w3-row-padding"><div class="w3-third"><input class="w3-input w3-border" type="text" placeholder="One"></div>...</div>`. [S1]
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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- **입력 필드 기본 테두리**: w3-input이 기본적으로 하단 테두리를 가지며, 테두리 없는 형태는 w3-border-0으로 명시적으로 제거해야 한다는 점이 강조됨. [S1]
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## 🛠️ 적용 사례 (Applied in summary)
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현재 발견된 실제 적용 사례가 없습니다 — Responsive Grid로 3개 입력 필드를 한 줄에 배치하는 것이 폼 레이아웃의 대표 실전 사례다. [S1]
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## 💻 코드 패턴 (Code patterns)
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Input focus animation expanding to full width (HTML):
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```html
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<input class="w3-input w3-animate-input" type="text" style="width:30%">
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```
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.89
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[W3.CSS Tutorial]]
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- **관련 개념:** [[W3CSS Images]], [[W3CSS Badges]], [[W3CSS Grid]]
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- **참조 맥락:** Tables/Lists/Forms 섹션의 마지막 — 배지(Badges) 챕터로 이어짐.
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## 📚 출처 (Sources)
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- [S1] W3Schools — W3.CSS Input — https://www.w3schools.com/w3css/w3css_input.asp
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## 📝 변경 이력 (Change history)
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- 2026-07-04: Initial draft synthesized from the W3Schools "W3.CSS Input" page (Astra wiki-curation, P-Reinforce v3.1 format).
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