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74 lines
3.7 KiB
Markdown
74 lines
3.7 KiB
Markdown
---
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id: w3css-alerts
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title: "W3CSS Alerts"
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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: ["alert boxes", "× close button", "W3.CSS 알림"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.88
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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", "alerts"]
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raw_sources: ["https://www.w3schools.com/w3css/w3css_alerts.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[W3CSS Alerts]]
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## 🎯 한 줄 통찰 (One-line insight)
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The source explicitly prefers the `×` HTML entity over the literal letter "X" for close buttons — a small but deliberate detail, since `×` renders as a proper multiplication-style cross symbol rather than relying on the letter X looking "close enough," making the close affordance visually distinct from actual text content. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **No dedicated alert class** — alerts are `w3-panel` + a STRONG (saturated) color, contrasted against Notes' PALE colors. [S1]
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- **Semantic color convention** — red (danger), yellow (warning), green (success), blue (information) — though any color can technically be used. [S1]
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- **Dismissible via inline `onclick`** — `this.parentElement.style.display='none'` on a `w3-button w3-display-topright` span containing `×`. [S1]
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- **`×` preferred over literal "X"** — explicitly recommended as the standard close-icon character. [S1]
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- **Composable with rounding and cards** — `w3-round`/`w3-round-large`/`w3-round-xxlarge` or `w3-card-4` can be layered onto an alert panel. [S1]
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## 📖 세부 내용 (Details)
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- Strong-color alert (Danger): `<div class="w3-panel w3-red"><h3>Danger!</h3><p>Red often indicates a dangerous or negative situation.</p></div>`. [S1]
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- Dismiss button: `<span onclick="this.parentElement.style.display='none'" class="w3-button w3-display-topright">×</span>`. [S1]
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- Rounded alert: `<div class="w3-panel w3-green w3-round">`. [S1]
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- Card-style alert: `<div class="w3-panel w3-yellow w3-card-4">`. [S1]
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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- **닫기 아이콘 권장사항**: 닫기 버튼에는 문자 "X"보다 × HTML 엔티티가 선호된다는 점이 팁으로 명시됨. [S1]
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## 🛠️ 적용 사례 (Applied in summary)
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현재 발견된 실제 적용 사례가 없습니다 — onclick 인라인 이벤트만으로 별도 JS 파일 없이 알림을 닫는 것이 경량 UI 인터랙션의 대표 사례다. [S1]
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## 💻 코드 패턴 (Code patterns)
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Dismissible alert using the × entity (HTML):
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```html
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<div class="w3-panel w3-red w3-display-container">
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<span onclick="this.parentElement.style.display='none'"
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class="w3-button w3-display-topright">×</span>
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<h3>Danger!</h3>
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<p>Red often indicates a dangerous or negative situation.</p>
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</div>
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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:** 0.88
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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 Quotes]], [[W3CSS Panels]], [[W3CSS Tables]]
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- **참조 맥락:** Buttons & Content Blocks 섹션의 마지막 — 테이블(Tables) 챕터로 이어짐.
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## 📚 출처 (Sources)
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- [S1] W3Schools — W3.CSS Alerts — https://www.w3schools.com/w3css/w3css_alerts.asp
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## 📝 변경 이력 (Change history)
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- 2026-07-04: Initial draft synthesized from the W3Schools "W3.CSS Alerts" page (Astra wiki-curation, P-Reinforce v3.1 format).
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