docs(10_Wiki): W3Schools 위키화 — HTML/CSS/JavaScript(core)
W3Schools 튜토리얼을 P-Reinforce v3.1 포맷으로 위키화(영어 본문, 한/영 섹션 헤더). - Topic_HTML: 59문서 (튜토리얼+예제, 레퍼런스/메타 제외) - Topic_CSS: 190문서 (메인 + Advanced/Flexbox/Grid/RWD 전체) - Topic_JavaScript: 120문서 (코어 언어; Temporal/DOM상세/BOM/WebAPI/AJAX/jQuery/Graphics 등은 후속) 각 폴더 00_INDEX.md(MOC) 포함. 코드 verbatim, 미확인분은 "Not found in source" 표기. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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id: html-buttons
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title: "HTML Buttons"
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category: "Frontend"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["button element", "HTML button", "button type", "submit button", "reset button"]
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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: 2026-06-23
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updated_at: 2026-06-23
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review_reason: ""
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merge_history: []
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tags: ["html", "web", "frontend", "w3schools", "buttons", "forms"]
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raw_sources: ["https://www.w3schools.com/html/html_buttons.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[HTML Buttons]]
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## 🎯 한 줄 통찰 (One-line insight)
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The HTML `<button>` element defines a clickable button whose behavior is set by its `type` attribute (`button`, `submit`, or `reset`); you should always specify `type` because the in-form default differs and browsers behave inconsistently when it is omitted. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **`<button>` element** — defines a clickable button; by itself it does nothing until you add an action. [S1]
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- **`type` attribute** — defines what the button does when clicked; three types: `button`, `submit`, `reset`. [S1]
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- **Always set `type`** — inside a form the default type is `submit`, and browsers may behave differently if the type is omitted. [S1]
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- **`disabled` attribute** — makes a button unclickable; disabled buttons usually appear faded. [S1]
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- **Add behavior** — actions can be attached, e.g. with `onclick`. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Type-driven behavior** — `type="button"` (does nothing by default), `type="submit"` (submits a form), `type="reset"` (resets all form fields). [S1]
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- **Form button pair** — a submit button plus a reset button inside a `<form>`. [S1]
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- **Inline action** — `<button onclick="...">`. [S1]
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- **Styling via class** — buttons are commonly styled with CSS through a class. [S1]
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## 📖 세부 내용 (Details)
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**The button element**
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The HTML `<button>` element defines a clickable button. By itself, the button does nothing until you add an action to it. [S1]
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```html
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<button>Click Me</button>
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```
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**Button types**
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The `type` attribute defines what a button does when clicked. There are three button types: [S1]
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- `type="button"` — a normal clickable button (does nothing by default)
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- `type="submit"` — submits a form
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- `type="reset"` — resets all form fields
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```html
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<button type="button">Normal Button</button>
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<button type="submit">Submit</button>
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<button type="reset">Reset</button>
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```
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Example within a form: [S1]
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```html
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<form action="/action_page.php">
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First name: <input type="text" name="fname">
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<button type="submit">Submit</button>
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<button type="reset">Reset Form</button>
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</form>
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```
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**Note:** You should always specify the type attribute. Inside a form, the default type is submit, and browsers may behave differently if the type is omitted. [S1]
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**Styling buttons**
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Buttons are often styled with CSS: [S1]
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```html
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<button class="mytestbtn">Green Button</button>
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```
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**Disabled buttons**
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Use the `disabled` attribute to make a button unclickable: [S1]
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```html
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<button disabled>Disabled Button</button>
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```
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**Tip:** Disabled buttons cannot be clicked and usually appear faded. [S1]
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**Button with JavaScript**
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```html
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<button onclick="alert('Hello!')">Click Me</button>
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```
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## 🛠️ 적용 사례 (Applied in summary)
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The applied cases are a plain clickable button, the three typed buttons, a submit/reset pair inside a form, a CSS-styled button, a disabled button, and a button that runs JavaScript via `onclick`. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Typed buttons (HTML):
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```html
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<button type="button">Normal Button</button>
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<button type="submit">Submit</button>
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<button type="reset">Reset</button>
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```
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Button running JavaScript (HTML):
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```html
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<button onclick="alert('Hello!')">Click Me</button>
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```
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Disabled button (HTML):
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```html
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<button disabled>Disabled Button</button>
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```
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## ⚖️ 비교 및 선택 기준 (Comparison & decision criteria)
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The page presents three button types; choosing the right `type` is essential because the in-form default is `submit`: [S1]
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| `type` value | Behavior when clicked | Use when |
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|---|---|---|
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| `button` | A normal clickable button; does nothing by default | You want a button with custom (e.g. JavaScript) behavior only |
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| `submit` | Submits the form (the in-form default) | The button should send the form |
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| `reset` | Resets all form fields | The button should clear the form |
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Always specify the `type` to avoid inconsistent browser behavior when it is omitted. [S1]
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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No contradictions found in the source. Important caveat: omitting `type` inside a form defaults to `submit` and can cause divergent browser behavior, so it should always be set explicitly. [S1]
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
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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:** [[HTML Tutorial]]
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- **관련 개념:** [[HTML Forms]], [[HTML Form Elements]], [[HTML Input Types]], [[HTML Accessibility]]
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- **참조 맥락:** Referenced whenever adding clickable controls or form submit/reset actions to a page.
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## 📚 출처 (Sources)
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- [S1] W3Schools — HTML Buttons — https://www.w3schools.com/html/html_buttons.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "HTML Buttons" page (Astra wiki-curation, P-Reinforce v3.1 format).
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