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>

10_Wiki/Topic_JavaScript/JavaScript_Async_Timeouts.md

@@ -0,0 +1,122 @@
+---
+id: javascript-async-timeouts
+title: "JavaScript Async Timeouts"
+category: "Frontend"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["setTimeout", "setInterval", "JS timers", "Timeout scheduling", "Delayed execution"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.9
+created_at: 2026-06-23
+updated_at: 2026-06-23
+review_reason: ""
+merge_history: []
+tags: ["javascript", "js", "web", "frontend", "w3schools", "settimeout", "setinterval", "timers"]
+raw_sources: ["https://www.w3schools.com/js/js_async_timeouts.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[JavaScript Async Timeouts]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+`setTimeout()` schedules a function to run after a delay in milliseconds, and `setInterval()` repeats it every interval — both delay execution without freezing the browser. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **setTimeout schedules once** — `setTimeout()` schedules a function to run after a delay in milliseconds; it is an async operation used to delay code execution without freezing the browser. [S1]
+- **setInterval repeats** — with `setInterval()` you specify a function to be executed for each interval. [S1]
+- **Pass the function, not its call** — when passing a function as an argument, do not use parentheses; `setTimeout(myFunction, 3000)` is right, `setTimeout(myFunction(), 3000)` is wrong. [S1]
+- **Timeouts lead into callbacks** — a callback runs after another function finishes, and callbacks were the first solution for asynchronous JavaScript. [S1]
+
+## 🧩 추출된 패턴 (Extracted patterns)
+- **Named-callback scheduling** — `setTimeout(myFunction, ms)` defers a named function. [S1]
+- **Anonymous wrapper for arguments** — wrap the call in an anonymous function, `setTimeout(function(){ myFunction("...") }, ms)`, when you need to pass arguments. [S1]
+- **Repeating clock with setInterval** — `setInterval(fn, ms)` re-runs a function on a fixed cadence (e.g. a live clock). [S1]
+
+## 📖 세부 내용 (Details)
+**The setTimeout() method**
+The `setTimeout()` method schedules a function to run after a delay in milliseconds. It is an async operation used to delay code execution without freezing the browser. [S1]
+```javascript
+setTimeout(myFunction, 3000);
+
+function myFunction() {
+  document.getElementById("demo").innerHTML = "I love You !!";
+}
+```
+In the example above, `myFunction` is passed to `setTimeout()` as an argument. `3000` is the number of milliseconds before `myFunction` will be called. When you pass a function as an argument, remember not to use parenthesis. [S1]
+
+**Passing arguments with an anonymous function**
+[S1]
+```javascript
+setTimeout(function() { myFunction("I love You !!!"); }, 3000);
+
+function myFunction(value) {
+  document.getElementById("demo").innerHTML = value;
+}
+```
+
+**The setInterval() method**
+When using the `setInterval()` method, you can specify a function to be executed for each interval. In the example below, `myFunction` is passed to `setInterval()` as an argument and `1000` is the number of milliseconds between every time `myFunction` will be called. [S1]
+```javascript
+setInterval(myFunction, 1000);
+
+function myFunction() {
+  let d = new Date();
+  document.getElementById("demo").innerHTML=
+  d.getHours() + ":" +
+  d.getMinutes() + ":" +
+  d.getSeconds();
+}
+```
+
+**Note (right vs wrong):**
+[S1]
+- Right: `setTimeout(myFunction, 3000);`
+- Wrong: `setTimeout(myFunction(), 3000);`
+
+**Next step**
+A callback runs after another function finishes. Callbacks were the first solution for asynchronous JavaScript. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+The page's snippets — deferring a message with `setTimeout`, passing an argument via an anonymous wrapper, and a live clock with `setInterval` — are the canonical applied examples. No external project/commit applications found in the source.
+
+## 💻 코드 패턴 (Code patterns)
+Schedule a named function once (language: JavaScript):
+```javascript
+setTimeout(myFunction, 3000);
+
+function myFunction() {
+  document.getElementById("demo").innerHTML = "I love You !!";
+}
+```
+Pass an argument via an anonymous wrapper:
+```javascript
+setTimeout(function() { myFunction("I love You !!!"); }, 3000);
+```
+Repeat every interval:
+```javascript
+setInterval(myFunction, 1000);
+```
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+No contradictions found in the source.
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.90
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[JavaScript Tutorial]]
+- **관련 개념:** [[JavaScript Async]], [[JavaScript Async Callbacks]], [[JavaScript Asynchronous]], [[JavaScript Promise]]
+- **참조 맥락:** The first concrete async tool — timers — that motivates callbacks as the next solution.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — JavaScript Async Timeouts — https://www.w3schools.com/js/js_async_timeouts.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-06-23: Initial draft synthesized from the W3Schools "JavaScript Async Timeouts" page (Astra wiki-curation, P-Reinforce v3.1 format).