The number of # at the start of a line sets the level. Headings also appear in the Outline.

# Heading 1## Heading 2### Heading 3

Separate paragraphs with a blank line. By default, line breaks inside a paragraph are joined. End a line with two spaces or \ to break it. Turn on “Keep Line Breaks in Paragraphs” in Settings to keep every line break.

This is the first paragraph.This line joins the previous one.This is the second paragraph.\This starts a new line.

In the editor, toggle them with Ctrl+B (bold), Ctrl+I (italic), and Ctrl+Shift+X (strikethrough).

**Bold**, *italic*, ~~strikethrough~~, `inline code`

Start a line with - or a number. Indent to nest. In the editor, Tab and Shift+Tab indent and outdent.

- Apples- Oranges  - Mandarin  - Navel1. Read2. Write3. Save

http(s) links open in your default browser. Relative links to .md files open inside Marxdown. Images inside the folder of the opened file are shown.

[The Marxdown repository](https://github.com/antimacho612/marxdown)[Design notes](./docs/design.md)![The Marxdown mark](mark.svg)

Start a line with >. In the editor, toggle it with Ctrl+Shift+.

> Readability you can adjust.>> > Quotes can be nested.

Fence code with ``` and add a language name for syntax highlighting. Supported: Bash, C, C++, C#, CSS, Diff, Go, INI / TOML, Java, JavaScript, JSON, Markdown, Python, Rust, SQL, TypeScript, HTML / XML, and YAML.

```rustfn main() {    let name = "Marxdown";    println!("Hello, {name}!");}```

fn main() {
    let name = "Marxdown";
    println!("Hello, {name}!");
}

A line with only --- becomes a horizontal rule.

One topic---Another topic

You can write HTML. Scripts and event attributes like onclick are removed and never run.

<details><summary>Click to open</summary>This was folded.</details>Save with <kbd>Ctrl</kbd>+<kbd>S</kbd>

The position of : in the second row sets the alignment. In the editor, Tab moves to the next cell and Shift+Alt+F aligns the columns. Choose how borders are drawn with “Table Borders” in Settings.

| Strategy | p95 | Cost || :--- | ---: | :---: || No cache | 240ms | Low || TTL | 22ms | Low || Stale-While-Revalidate | 18ms | Medium |

In the editor, Ctrl+Enter toggles the check.

- [x] Compare strategies- [ ] Add expiry metrics- [ ] Load testing

URLs become links as they are.

Repository: https://github.com/antimacho612/marxdown

The same five kinds as GitHub.

> [!NOTE]> Useful information.> [!TIP]> Helpful advice.> [!IMPORTANT]> Key information.> [!WARNING]> Needs attention.> [!CAUTION]> Risky consequences.

Footnotes are collected at the end of the document.

Marxdown is built with Tauri[^1].[^1]: A framework for apps running on Rust and a WebView.

Wrap with $ for inline math, or $$ for a block, rendered with KaTeX. Amounts like $5 and $10 do not become math.

The mean latency is about $\bar{t} = h \cdot t_c + (1 - h) \cdot t_m$.$$\sum_{k=1}^{n} k = \frac{n(n+1)}{2}$$

A mermaid code block is shown as a diagram. Flowcharts, sequence diagrams, Gantt charts, and every other Mermaid diagram work.

```mermaidsequenceDiagram  Terminal->>Marxdown: marxdown README.md  Marxdown-->>Terminal: Prompt returns right away  Marxdown->>Marxdown: Open as a tab```

YAML fenced with --- at the top is shown as a table, apart from the body. Use “Front Matter” in Settings to show it as YAML or hide it.

---title: Design notestags: [cache, api]---# Design notes

Put marp: true in the front matter to show the document as Marp slides. Separate slides with ---. Load your own themes with “Marp Themes” in Settings.

---marp: truetheme: defaultpaginate: true---# Caching strategyLowering the p95 of the search API---## DecisionAdopt Stale-While-Revalidate

Shows ==text== as if marked with a highlighter.

The answer is ==Stale-While-Revalidate==.

Shows ++text++ underlined, as inserted text.

The p95 is now ++18ms++.

Shows text wrapped in ^ as superscript.

E = mc^2^

Shows text wrapped in ~ as subscript.

H~2~O

Start the line after a term with : to make a definition list.

TTL: Expires entries after a fixed timeStale-While-Revalidate: Returns the stale response while refreshing in the background

Words defined as *[ABBR]: Description show the description on hover.

CSP restricts what can be loaded.*[CSP]: Content Security Policy

Put \ after the last | of a row to continue the same cells on the next line. The continued lines are read together as Markdown, so a cell can hold a list. A cell containing ^^ merges with the cell above it.

| Strategy | Traits | Cost || --- | --- | --- || TTL | - Expires after a fixed time | Low |\|     | - Easy to build | || No cache | Always fresh | ^^ || SWR | Returns stale data while refreshing | Medium |