---
id: html-comments
title: "HTML Comments"
category: "Frontend"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["HTML comment syntax", "comment tag", "comment out HTML", "hide HTML content", "HTML annotations"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.90
created_at: 2026-06-23
updated_at: 2026-06-23
review_reason: ""
merge_history: []
tags: ["html", "web", "frontend", "w3schools", "comments", "debugging"]
raw_sources: ["https://www.w3schools.com/html/html_comments.asp"]
applied_in: []
github_commit: ""
---

# [[HTML Comments]]

## 🎯 한 줄 통찰 (One-line insight)
HTML comments are written between `<!--` and `-->`, are not displayed in the browser, and help document source code, hide content temporarily, and debug pages. [S1]

## 🧠 핵심 개념 (Core concepts)
- **Comments are invisible** — HTML comments are not displayed in the browser, but they can help document your HTML source code. [S1]
- **Comment syntax** — written as `<!-- Write your comments here -->`. The exclamation point (`!`) appears in the opening tag but not the closing tag. [S1]
- **Documentation use** — comments can hold notes and reminders for the author. [S1]
- **Hiding content** — comments can temporarily conceal content (a block, multiple lines, or a mid-line/inline section). [S1]
- **Debugging aid** — comment out HTML lines individually to locate errors. [S1]

## 🧩 추출된 패턴 (Extracted patterns)
- **Note/reminder pattern** — drop `<!-- reminder -->` markers near relevant markup. [S1]
- **Block-hide pattern** — wrap one or many lines in `<!-- … -->` to remove them from rendering without deleting them. [S1]
- **Inline-hide pattern** — `<!-- … -->` placed mid-line hides just that fragment. [S1]
- **Debug-by-elimination pattern** — comment out lines one at a time to isolate the source of an error. [S1]

## 📖 세부 내용 (Details)
HTML comments are not displayed in the browser, but they can help document your HTML source code. [S1]

**Comment syntax**
The basic syntax for an HTML comment is the text written between `<!--` and `-->`. Note that the exclamation point (`!`) appears in the opening tag but not the closing tag. [S1]
```html
<!-- Write your comments here -->
```

**Adding comments**
Comments can include notifications and reminders. [S1]
```html
<!-- This is a comment -->

<p>This is a paragraph.</p>

<!-- Remember to add more information here -->
```

**Hiding content**
Comments can conceal content temporarily. [S1]
```html
<p>This is a paragraph.</p>

<!-- <p>This is another paragraph </p> -->

<p>This is a paragraph too.</p>
```

Multiple lines can be hidden between the opening and closing comment delimiters. Comments are useful for debugging — comment out HTML lines individually to locate errors. [S1]
```html
<p>This is a paragraph.</p>
<!--
<p>Look at this cool image:</p>
<img border="0" src="pic_trulli.jpg" alt="Trulli">
-->
<p>This is a paragraph too.</p>
```

**Hiding inline content**
Comments can obscure mid-code (inline) sections. [S1]
```html
<p>This <!-- great text --> is a paragraph.</p>
```

## 🛠️ 적용 사례 (Applied in summary)
The reminder note, the block-hidden paragraph/image, and the inline-hidden fragment above are the canonical applied examples from the source. No external project/commit applications found in the source.

## 💻 코드 패턴 (Code patterns)
Basic comment (HTML):
```html
<!-- Write your comments here -->
```
Comment out a block of markup:
```html
<!--
<p>Look at this cool image:</p>
<img border="0" src="pic_trulli.jpg" alt="Trulli">
-->
```
Hide an inline fragment:
```html
<p>This <!-- great text --> is a paragraph.</p>
```

## ⚖️ 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:** [[HTML Tutorial]]
- **관련 개념:** [[HTML Introduction]], [[HTML Elements]], [[HTML Attributes]], [[HTML Quotations]]
- **참조 맥락:** Referenced when documenting markup, hiding content during development, or debugging by elimination.

## 📚 출처 (Sources)
- [S1] W3Schools — HTML Comments — https://www.w3schools.com/html/html_comments.asp

## 📝 변경 이력 (Change history)
- 2026-06-23: Initial draft synthesized from the W3Schools "HTML Comments" page (Astra wiki-curation, P-Reinforce v3.1 format).
