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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>
154 lines
5.0 KiB
Markdown
154 lines
5.0 KiB
Markdown
---
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id: javascript-dom-animations
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title: "JavaScript DOM Animations"
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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: ["DOM animation", "JavaScript animation", "setInterval animation", "animate element", "frame animation"]
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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_animate.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[JavaScript DOM Animations]]
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## 🎯 한 줄 통찰 (One-line insight)
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JavaScript animations work by programming gradual changes to an element's style, driven by a timer — with a small interval, the motion looks continuous. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **Animation = timed style changes** — JavaScript animations are done by programming gradual changes in an element's style; the changes are called by a timer, and a small interval makes the animation look continuous. [S1]
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- **Relative container, absolute element** — the container element should be created with `style = 'position: relative'`, and the animation element with `style = 'position: absolute'`. [S1]
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- **setInterval / clearInterval drive frames** — a repeating timer calls a `frame()` function until a finish condition is met, then clears the interval. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Timer loop** — `id = setInterval(frame, 5)` repeatedly calls `frame()`, which either ends (`clearInterval(id)`) or applies the next incremental style change. [S1]
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- **Increment position** — bump a `pos` counter each frame and write it to `style.top` / `style.left` as pixel values. [S1]
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- **Reset before start** — call `clearInterval(id)` before starting a new interval to avoid stacking timers. [S1]
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## 📖 세부 내용 (Details)
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**A Basic Web Page** [S1]
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Start from a simple page with a placeholder element: [S1]
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```html
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<!DOCTYPE html>
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<html>
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<body>
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<h1>My First JavaScript Animation</h1>
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<div id="animation">My animation will go here</div>
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</body>
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</html>
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```
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**Create an Animation Container** [S1]
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Wrap the animated element in a container: [S1]
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```html
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<div id="container">
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<div id="animate">My animation will go here</div>
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</div>
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```
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**Style the Elements** [S1]
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The container is positioned `relative` and the animated element `absolute`: [S1]
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```css
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#container {
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width: 400px;
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height: 400px;
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position: relative;
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background: yellow;
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}
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#animate {
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width: 50px;
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height: 50px;
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position: absolute;
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background: red;
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}
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```
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**Animation Code** [S1]
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The general timer-driven pattern: [S1]
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```javascript
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id = setInterval(frame, 5);
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function frame() {
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if (/* test for finished */) {
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clearInterval(id);
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} else {
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/* code to change the element style */
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}
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}
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```
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**Create the Full Animation Using JavaScript** [S1]
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The complete animation moves the element diagonally until `pos == 350`: [S1]
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```javascript
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function myMove() {
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let id = null;
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const elem = document.getElementById("animate");
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let pos = 0;
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clearInterval(id);
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id = setInterval(frame, 5);
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function frame() {
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if (pos == 350) {
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clearInterval(id);
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} else {
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pos++;
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elem.style.top = pos + 'px';
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elem.style.left = pos + 'px';
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}
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}
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}
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```
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## 🛠️ 적용 사례 (Applied in summary)
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The page's `myMove()` function — moving `#animate` diagonally inside `#container` via `setInterval` — 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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Full timer-driven animation (language: JavaScript):
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```javascript
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function myMove() {
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let id = null;
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const elem = document.getElementById("animate");
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let pos = 0;
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clearInterval(id);
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id = setInterval(frame, 5);
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function frame() {
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if (pos == 350) {
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clearInterval(id);
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} else {
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pos++;
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elem.style.top = pos + 'px';
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elem.style.left = pos + 'px';
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}
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}
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}
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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 Changing CSS]], [[JavaScript HTML DOM]], [[JavaScript HTML Events]], [[JavaScript DOM Methods]]
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- **참조 맥락:** Builds on style manipulation; uses timers to apply incremental style changes over time.
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## 📚 출처 (Sources)
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- [S1] W3Schools — JavaScript DOM Animations — https://www.w3schools.com/js/js_htmldom_animate.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "JavaScript DOM Animations" page (Astra wiki-curation, P-Reinforce v3.1 format).
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