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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>
91 lines
4.6 KiB
Markdown
91 lines
4.6 KiB
Markdown
---
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id: javascript-html-dom
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title: "JavaScript HTML DOM"
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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: ["HTML DOM", "Document Object Model", "DOM tree", "DOM nodes", "HTML Document Object Model"]
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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: ["javascript", "js", "web", "frontend", "w3schools", "dom"]
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raw_sources: ["https://www.w3schools.com/js/js_htmldom.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[JavaScript HTML DOM]]
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## 🎯 한 줄 통찰 (One-line insight)
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The HTML DOM is an object model that represents an HTML page as a tree of nodes, giving JavaScript a standardized way to access and change every element on the page. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **The HTML DOM is an Object Model for HTML Documents** — it represents an HTML page as a tree of nodes. [S1]
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- **The browser builds the tree on load** — when a webpage loads, the browser creates a tree-like representation of the document made of nodes: Document, Element nodes (such as `<html>`, `<body>`, `<a>`), Attribute nodes, and Text nodes. [S1]
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- **Three roles in one access expression** — `id="demo"` is an HTML property, `getElementById()` is a DOM method, and `innerHTML` is a DOM property. [S1]
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- **The DOM is a W3C Standard** — defined by the World Wide Web Consortium in three parts: Core DOM, XML DOM, and HTML DOM. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Access then modify** — get a node reference with a DOM method, then read or write a DOM property on it. [S1]
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- **Tree traversal mindset** — because the page is a tree of nodes, navigation and manipulation are expressed in terms of elements, attributes, and text nodes. [S1]
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## 📖 세부 내용 (Details)
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**The HTML DOM** [S1]
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The HTML DOM (HTML Document Object Model) is an Object Model for HTML Documents. It represents an HTML page as a tree of nodes. [S1]
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**The DOM Tree** [S1]
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When a webpage loads, the browser creates a tree-like representation of the document. This tree is made of nodes for the different parts of the document: the Document node, Element nodes (for example `<html>`, `<body>`, `<a>`), Attribute nodes, and Text nodes. [S1]
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**Accessing HTML Elements** [S1]
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HTML elements are accessed through the document. The following example accesses a paragraph element by its id and changes its content: [S1]
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```javascript
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// Access a paragraph Element
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const myPara = document.getElementById("demo");
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// Change the content of the Element
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myPara.innerHTML = "Hello World!";
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```
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In this example, `id="demo"` is an HTML property, `getElementById()` is a DOM method, and `innerHTML` is a DOM property. [S1]
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**What You Will Learn** [S1]
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The tutorial covers how to: change the content of HTML elements, change the style (CSS) of HTML elements, add and delete HTML elements, and react to HTML events. [S1]
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**The World Wide Web Consortium** [S1]
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The DOM is a W3C Standard (World Wide Web Consortium). The W3C DOM standard is separated into three parts: Core DOM, XML DOM, and HTML DOM. [S1]
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## 🛠️ 적용 사례 (Applied in summary)
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The page's own snippet — selecting `#demo` with `getElementById()` and assigning to `innerHTML` — is the canonical applied example. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Access an element by id and change its content (language: JavaScript):
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```javascript
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const myPara = document.getElementById("demo");
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myPara.innerHTML = "Hello World!";
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```
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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No contradictions found in the source.
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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:** [[JavaScript Tutorial]]
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- **관련 개념:** [[JavaScript DOM Methods]], [[JavaScript DOM Elements]], [[JavaScript DOM Changing HTML]], [[JavaScript Introduction]]
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- **참조 맥락:** The foundational model referenced by every DOM manipulation, styling, and event topic.
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## 📚 출처 (Sources)
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- [S1] W3Schools — JavaScript HTML DOM — https://www.w3schools.com/js/js_htmldom.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "JavaScript HTML DOM" page (Astra wiki-curation, P-Reinforce v3.1 format).
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