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docs(katex): added documentation

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NicolasNewman 2023-06-24 16:57:22 +09:00
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> **Warning**
>
> ## THIS IS AN AUTOGENERATED FILE. DO NOT EDIT.
>
> ## Please edit the corresponding file in [/packages/mermaid/src/docs/config/math.md](../../packages/mermaid/src/docs/config/math.md).
# Math Configuration
Mermaid supports rendering mathematical expressions through the [KaTeX](https://katex.org/) typesetter.
## Usage
To render math within a diagram, surround the mathematical expression with the `$$` delimiter.
Note that at the moment, the only supported diagrams are below:
### Flowcharts
```mermaid-example
graph LR
A["$$x^2$$"] -->|"$$\sqrt{x+3}$$"| B("$$\frac{1}{2}$$")
A -->|"$$\overbrace{a+b+c}^{\text{note}}$$"| C("$$\pi r^2$$")
B --> D("$$x = \begin{cases} a &\text{if } b \\ c &\text{if } d \end{cases}$$")
C --> E("$$x(t)=c_1\begin{bmatrix}-\cos{t}+\sin{t}\\ 2\cos{t} \end{bmatrix}e^{2t}$$")
```
```mermaid
graph LR
A["$$x^2$$"] -->|"$$\sqrt{x+3}$$"| B("$$\frac{1}{2}$$")
A -->|"$$\overbrace{a+b+c}^{\text{note}}$$"| C("$$\pi r^2$$")
B --> D("$$x = \begin{cases} a &\text{if } b \\ c &\text{if } d \end{cases}$$")
C --> E("$$x(t)=c_1\begin{bmatrix}-\cos{t}+\sin{t}\\ 2\cos{t} \end{bmatrix}e^{2t}$$")
```
### Sequence
```mermaid-example
sequenceDiagram
autonumber
participant 1 as $$\alpha$$
participant 2 as $$\beta$$
1->>2: Solve: $$\sqrt{2+2}$$
2-->>1: Answer: $$2$$
Note right of 2: $$\sqrt{2+2}=\sqrt{4}=2$$
```
```mermaid
sequenceDiagram
autonumber
participant 1 as $$\alpha$$
participant 2 as $$\beta$$
1->>2: Solve: $$\sqrt{2+2}$$
2-->>1: Answer: $$2$$
Note right of 2: $$\sqrt{2+2}=\sqrt{4}=2$$
```
## Legacy Support
By default, MathML is used for rendering mathematical expressions. If you have users on [unsupported browsers](https://caniuse.com/?search=mathml), `legacyMathML` can be set in the config to fall back to CSS rendering. Note that **you must provide KaTeX's stylesheets on your own** as they do not come bundled with Mermaid.
Example with legacy mode enabled (the latest version of KaTeX's stylesheet can be found on their [docs](https://katex.org/docs/browser.html)):
```html
<!DOCTYPE html>
<!-- KaTeX requires the use of the HTML5 doctype. Without it, KaTeX may not render properly -->
<html lang="en">
<head>
<!-- Please ensure the stylesheet's version matches with the KaTeX version in your package-lock -->
<link
rel="stylesheet"
href="https://cdn.jsdelivr.net/npm/katex@{version_number}/dist/katex.min.css"
integrity="sha384-{hash}"
crossorigin="anonymous"
/>
</head>
<body>
<script type="module">
import mermaid from './mermaid.esm.mjs';
mermaid.initialize({
legacyMathML: true,
});
</script>
</body>
</html>
```

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packages/mermaid/src/docs/.vitepress/config.ts
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@ -156,6 +156,7 @@ function sidebarConfig() {
{ text: 'Mermaid API Configuration', link: '/config/setup/README' },
{ text: 'Directives', link: '/config/directives' },
{ text: 'Theming', link: '/config/theming' },
{ text: 'Math', link: '/config/math' },
{ text: 'Accessibility', link: '/config/accessibility' },
{ text: 'Mermaid CLI', link: '/config/mermaidCLI' },
{ text: 'Advanced usage', link: '/config/n00b-advanced' },

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# Math Configuration
Mermaid supports rendering mathematical expressions through the [KaTeX](https://katex.org/) typesetter.
## Usage
To render math within a diagram, surround the mathematical expression with the `$$` delimiter.
Note that at the moment, the only supported diagrams are below:
### Flowcharts
```mermaid
graph LR
A["$$x^2$$"] -->|"$$\sqrt{x+3}$$"| B("$$\frac{1}{2}$$")
A -->|"$$\overbrace{a+b+c}^{\text{note}}$$"| C("$$\pi r^2$$")
B --> D("$$x = \begin{cases} a &\text{if } b \\ c &\text{if } d \end{cases}$$")
C --> E("$$x(t)=c_1\begin{bmatrix}-\cos{t}+\sin{t}\\ 2\cos{t} \end{bmatrix}e^{2t}$$")
```
### Sequence
```mermaid
sequenceDiagram
autonumber
participant 1 as $$\alpha$$
participant 2 as $$\beta$$
1->>2: Solve: $$\sqrt{2+2}$$
2-->>1: Answer: $$2$$
Note right of 2: $$\sqrt{2+2}=\sqrt{4}=2$$
```
## Legacy Support
By default, MathML is used for rendering mathematical expressions. If you have users on [unsupported browsers](https://caniuse.com/?search=mathml), `legacyMathML` can be set in the config to fall back to CSS rendering. Note that **you must provide KaTeX's stylesheets on your own** as they do not come bundled with Mermaid.
Example with legacy mode enabled (the latest version of KaTeX's stylesheet can be found on their [docs](https://katex.org/docs/browser.html)):
```html
<!DOCTYPE html>
<!-- KaTeX requires the use of the HTML5 doctype. Without it, KaTeX may not render properly -->
<html lang="en">
<head>
<!-- Please ensure the stylesheet's version matches with the KaTeX version in your package-lock -->
<link
rel="stylesheet"
href="https://cdn.jsdelivr.net/npm/katex@{version_number}/dist/katex.min.css"
integrity="sha384-{hash}"
crossorigin="anonymous"
/>
</head>
<body>
<script type="module">
import mermaid from './mermaid.esm.mjs';
mermaid.initialize({
legacyMathML: true,
});
</script>
</body>
</html>
```