EDITOR

# Markdown Editor

Welcome to the **Free Online Markdown Editor**.

## Basic Features

### Documents & Saving
- **Folder Structure**: Organize your documents neatly
- **Auto-save**: Automatically saves every 30 seconds
- **Undo/Redo**: `Ctrl+Z` / `Ctrl+Y`

### Images & Sharing
- **Drag & Drop** image upload
- **Clipboard Paste** (`Ctrl+V`)
- **Share Links & QR Code** generation

---

## Extended Markdown Syntax

### Math Equations (LaTeX)

Inline equations: $E = mc^2$ and $\\sum_{i=1}^{n} x_i$

Block equations:

$$
\\int_{-\\infty}^{\\infty} e^{-x^2} dx = \\sqrt{\\pi}
$$

#### Heading Level 4
##### Heading Level 5
###### Heading Level 6

### Highlights

You can ==highlight important parts== in a sentence.

### Footnotes

The markdown editor supports various syntax extensions[^1].

[^1]: Extended syntax based on GitHub Flavored Markdown.

### Emoji

Emoji shortcodes: :rocket: :heart: :star: :fire:

### Mermaid Diagrams

```mermaid
graph TD
    A[Markdown Input] --> B{Parsing}
    B --> C[remark-gfm]
    B --> D[remark-math]
    B --> E[remark-emoji]
    C --> F[Rendering]
    D --> F
    E --> F
```

### Checklist

- [x] Basic Markdown support
- [x] Math equations (LaTeX)
- [x] Mermaid diagrams
- [x] Emoji shortcodes
- [x] Highlights, footnotes

### Collapsible Sections

<details>
<summary>Click to view details</summary>

This section can be collapsed and expanded.

```python
def fibonacci(n):
    if n <= 1:
        return n
    return fibonacci(n-1) + fibonacci(n-2)
```

</details>

### Code Syntax Highlighting

```typescript
interface MarkdownPlugin {
  name: string;
  transform: (content: string) => string;
}
```

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## Shortcuts

| Action | Shortcut | Description |
|--------|----------|-------------|
| Save | `Ctrl+S` | Save to documents |
| Bold | `Ctrl+B` | **Bold text** |
| Italic | `Ctrl+I` | *Italic text* |
| Link | `Ctrl+K` | Insert link |
| PDF Export | `Ctrl+P` | Save as PDF |

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> This editor is **open source**. Happy writing!

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