just-the-docs/docs/ui-components/code.md

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default	Code	UI Components	true	6

Code

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Table of contents

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1. TOC {:toc}

---

Inline code

Code can be rendered inline by wrapping it in single back ticks.

Lorem ipsum dolor sit amet, `` adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

Heading with <inline code snippet> in it.

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```markdown Lorem ipsum dolor sit amet, `` adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

Heading with <inline code snippet> in it.

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## Syntax highlighted code blocks

Use Jekyll's built-in syntax highlighting with Rouge for code blocks by using three backticks, followed by the language name:

<div class="code-example" markdown="1">
```js
// Javascript code with syntax highlighting.
var fun = function lang(l) {
  dateformat.i18n = require('./lang/' + l)
  return true;
}

{% highlight markdown %} ```js // Javascript code with syntax highlighting. var fun = function lang(l) { dateformat.i18n = require('./lang/' + l) return true; } ``` {% endhighlight %}

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Code blocks with rendered examples

To demonstrate front end code, sometimes it's useful to show a rendered example of that code. After including the styles from your project that you'll need to show the rendering, you can use a <div> with the code-example class, followed by the code block syntax. If you want to render your output with Markdown instead of HTML, use the markdown="1" attribute to tell Jekyll that the code you are rendering will be in Markdown format... This is about to get meta...

Link button{: .btn }

```markdown [Link button](http://example.com/){: .btn } ```

{% highlight markdown %}

Link button{: .btn }

```markdown [Link button](http://example.com/){: .btn } ``` {% endhighlight %}

---

Mermaid diagram code blocks

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New (v0.4.0) {: .label .label-green }

Mermaid allows you to add diagrams and visualizations using Markdown code blocks. It is disabled by default. However, you can turn on support for mermaid by adding a mermaid key to your _config.yml.

The minimum configuration requires a version key (matching a version in jsDelivr):

mermaid:
  # Version of mermaid library
  # Pick an available version from https://cdn.jsdelivr.net/npm/mermaid/
  version: "9.1.3"

Additional configuration options are loaded through _includes/mermaid_config.js. By default, the contents of the file are the empty object:

// _includes/mermaid_config.js
{}

This loads the default settings.

The contents of this object should follow mermaid's configuration API. For example, to override the theme, change _includes/mermaid_config.js to:

// _includes/mermaid_config.js
{
  theme: "forest"
}

Once mermaid is installed, it can be used in markdown files. The markdown for a simple flowchart example might look like the following:

{% highlight markdown %}

graph TD;
    A-->B;
    A-->C;
    B-->D;
    C-->D;

{% endhighlight %}

which renders:

graph TD;
    A-->B;
    A-->C;
    B-->D;
    C-->D;

Note: for demonstration purposes, we've enabled mermaid on this site. It is still disabled by default, and users need to opt-in to use it.

Copy button

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New (v0.4.0) {: .label .label-green }

The copy button for code blocks can be enabled or disabled via the enable_copy_code_button key in _config.yml. By default, the value of this key is false; users need to opt-in.

# For copy button on code
enable_copy_code_button: true

Note that this feature requires JavaScript; if JavaScript is disabled in the browser, this feature will not work.