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_String_Templates.md

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+---
+id: javascript-string-templates
+title: "JavaScript String Templates"
+category: "Frontend"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["template strings", "template literals", "back-tics", "string interpolation", "ES6 strings"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.89
+created_at: 2026-06-23
+updated_at: 2026-06-23
+review_reason: ""
+merge_history: []
+tags: ["javascript", "js", "web", "frontend", "w3schools", "template-literals", "interpolation", "es6"]
+raw_sources: ["https://www.w3schools.com/js/js_string_templates.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[JavaScript String Templates]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+Template strings use back-ticks instead of quotes, letting you embed both quote types, write multiline text, and interpolate variables and expressions with `${...}` — an ES6 feature supported in all modern browsers since June 2017. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Back-tics define the string** — template strings use back-ticks (`` ` ``) rather than the quotes (`"`) to define a string. [S1]
+- **Both quote types allowed inside** — template strings allow both single and double quotes inside a string. [S1]
+- **Multiline strings** — template strings allow multiline strings. [S1]
+- **Interpolation** — template strings allow variables in strings using the `${...}` syntax. [S1]
+- **Expression substitution** — template strings allow interpolation of expressions in strings. [S1]
+- **ES6 feature** — template strings are an ES6 feature; ES6 is fully supported in all modern browsers since June 2017. [S1]
+
+## 🧩 추출된 패턴 (Extracted patterns)
+- **Interpolate variables** — drop variables straight into text with `${variable}` instead of concatenating with `+`. [S1]
+- **Interpolate expressions** — compute inline, e.g. `${(price * (1 + VAT)).toFixed(2)}`. [S1]
+- **Build HTML templates** — assemble HTML by interpolating values and looping to append list items. [S1]
+
+## 📖 세부 내용 (Details)
+**Back-Tics Syntax**
+Template strings use back-ticks (`` ` ``) rather than the quotes (`"`) to define a string. [S1]
+```javascript
+let text = `Hello World!`;
+```
+
+**Quotes Inside Strings**
+Template strings allow both single and double quotes inside a string. [S1]
+```javascript
+let text = `He's often called "Johnny"`;
+```
+
+**Multiline Strings**
+Template strings allow multiline strings. [S1]
+```javascript
+let text =
+`The quick
+brown fox
+jumps over
+the lazy dog`;
+```
+
+**Interpolation**
+Template strings allow variables in strings, using the `${...}` interpolation syntax. [S1]
+```javascript
+let firstName = "John";
+let lastName = "Doe";
+
+let text = `Welcome ${firstName}, ${lastName}!`;
+```
+
+**Expression Substitution**
+Template strings allow interpolation of expressions in strings. [S1]
+```javascript
+let price = 10;
+let VAT = 0.25;
+
+let total = `Total: ${(price * (1 + VAT)).toFixed(2)}`;
+```
+
+**HTML Templates**
+Template strings can be used to build HTML by interpolating values and looping over data. [S1]
+```javascript
+let header = "Template Strings";
+let tags = ["template strings", "javascript", "es6"];
+
+let html = `<h2>${header}</h2><ul>`;
+for (const x of tags) {
+  html += `<li>${x}</li>`;
+}
+
+html += `</ul>`;
+```
+
+**Browser Support**
+Template strings are an ES6 feature, fully supported in all modern browsers since June 2017. [S1]
+
+| Browser | Chrome | Edge | Firefox | Safari | Opera |
+|---------|--------|------|---------|--------|-------|
+| Version | 51 | 15 | 54 | 10 | 38 |
+| Date | May 2016 | Apr 2017 | Jun 2017 | Sep 2016 | Jun 2016 |
+
+## 🛠️ 적용 사례 (Applied in summary)
+The page's own snippets are the canonical applied examples — basic back-tick strings, embedded quotes, multiline text, variable and expression interpolation, and an HTML-building loop. No external project/commit applications found in the source.
+
+## 💻 코드 패턴 (Code patterns)
+Interpolate variables:
+```javascript
+let text = `Welcome ${firstName}, ${lastName}!`;
+```
+Interpolate an expression:
+```javascript
+let total = `Total: ${(price * (1 + VAT)).toFixed(2)}`;
+```
+Build an HTML list:
+```javascript
+let html = `<h2>${header}</h2><ul>`;
+for (const x of tags) {
+  html += `<li>${x}</li>`;
+}
+html += `</ul>`;
+```
+
+## ⚖️ 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:** 0.89
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[JavaScript Tutorial]]
+- **관련 개념:** [[JavaScript Strings]], [[JavaScript String Methods]], [[JavaScript ES6]], [[JavaScript Variables]]
+- **참조 맥락:** Referenced whenever building dynamic text or HTML from variables, replacing `+` concatenation.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — JavaScript String Templates — https://www.w3schools.com/js/js_string_templates.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-06-23: Initial draft synthesized from the W3Schools "JavaScript String Templates" page (Astra wiki-curation, P-Reinforce v3.1 format).