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_Generators.md

@@ -0,0 +1,111 @@
+---
+id: javascript-generators
+title: "JavaScript Generators"
+category: "Frontend"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["JS generators", "function*", "yield", "generator object", "generator function"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.87
+created_at: 2026-06-23
+updated_at: 2026-06-23
+review_reason: ""
+merge_history: []
+tags: ["javascript", "js", "web", "frontend", "w3schools", "generators", "yield", "iterators"]
+raw_sources: ["https://www.w3schools.com/js/js_generators.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[JavaScript Generators]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+A JavaScript generator, declared with `function*`, can return multiple values one by one and can be paused and resumed using the `yield` keyword, returning a Generator Object that follows both the iterable and iterator protocols. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`function*` defines a generator** — generator functions use the `function*` syntax and, when invoked, return a Generator Object rather than a single value. [S1]
+- **Returns multiple values, one by one** — a generator can return (yield) a stream of multiple values, one at a time. [S1]
+- **Pausable and resumable** — generators can be paused and resumed; the `yield` keyword pauses execution and yields a value back to the caller while preserving internal state. [S1]
+- **Both iterable and iterator** — Generator Objects follow both the iterable and iterator protocols, so they work with `for...of` loops. [S1]
+- **`next()` shape** — calling `next()` returns an object of the form `{value: value, done: true|false}`. [S1]
+
+## 🧩 추출된 패턴 (Extracted patterns)
+- **Yield a sequence** — use multiple `yield` statements inside a `function*` to emit values one at a time on each `next()` call. [S1]
+- **`yield` vs `return`** — `yield` produces a value and pauses; `return` ends the generator. [S1]
+- **Consume with `for...of`** — because a generator is iterable, you can loop over its yielded values directly. [S1]
+
+## 📖 세부 내용 (Details)
+**JavaScript Generators**
+Generators are functions that can return multiple values, one by one. A JavaScript Generator can yield a stream of data. Generators can be paused and resumed. [S1]
+
+**Generator Functions**
+Generator functions are defined with the `function*` syntax. When called, a generator function does not run its body immediately — instead it returns a Generator Object structured as `{value:1, done:false}`. [S1]
+
+**Example — a generator with `yield` and `return`** [S1]
+```javascript
+function* myStream() {
+  yield 1;
+  yield 2;
+  return 3;
+}
+
+let myGenerator = myStream();
+
+for (let value of myGenerator) { }
+```
+
+**The `yield` Keyword**
+The `yield` keyword pauses execution and yields a value back to the caller. Generators maintain their internal state between `yield` calls, enabling resumption from the previous stopping point. [S1]
+
+**Generator Object Methods** [S1]
+
+| Method | Description |
+|--------|-------------|
+| `next()` | Resumes execution of the generator function |
+| `return()` | Finishes execution and returns the given value |
+| `throw()` | Throws an exception in execution |
+
+The `next()` method resumes execution of the generator function and returns `{ value: value, done: true|false}`. [S1]
+
+**Use Cases**
+Generators simplify creating custom iterators for complex data structures, enable efficient on-demand value generation including potentially infinite data streams, and historically were used to manage asynchronous operations before `async/await` became standard. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+The page's `myStream` generator (two `yield`s and a `return`, consumed via `for...of`) is the canonical applied example. No external project/commit applications found in the source.
+
+## 💻 코드 패턴 (Code patterns)
+Define and consume a generator (language: JavaScript):
+```javascript
+function* myStream() {
+  yield 1;
+  yield 2;
+  return 3;
+}
+
+let myGenerator = myStream();
+
+for (let value of myGenerator) { }
+```
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+The page notes that generators were historically used to manage asynchronous operations before `async/await` became the standard approach. [S1]
+
+## ✅ 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:** 0.87
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[JavaScript Tutorial]]
+- **관련 개념:** [[JavaScript Iterators]], [[JavaScript Iterables]], [[JavaScript Symbols]]
+- **참조 맥락:** Referenced when building custom iterators or producing lazy/on-demand value streams.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — JavaScript Generators — https://www.w3schools.com/js/js_generators.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-06-23: Initial draft synthesized from the W3Schools "JavaScript Generators" page (Astra wiki-curation, P-Reinforce v3.1 format).