## Recipes
### Use Prism `line-numbers` plugin
You can use Prism's wonderful suite of [plugins](https://prismjs.com/index.html#plugins) to extend
code block features. Here is a gist that implements the `line-numbers` plugin.
```html
<head>
<!-- Load Prism core and language autoloader -->
<script defer data-manual src="https://cdn.jsdelivr.net/gh/PrismJS/prism@1/components/prism-core.min.js"></script>
<script defer src="https://cdn.jsdelivr.net/gh/PrismJS/prism@1/plugins/autoloader/prism-autoloader.min.js"></script>
<!-- Load `line-numbers` plugin -->
<script defer src="https://cdn.jsdelivr.net/gh/PrismJS/prism@1/plugins/line-numbers/prism-line-numbers.min.js"></script>
<!-- Finally, load `<zero-md>` -->
<script type="module" src="https://cdn.jsdelivr.net/gh/zerodevx/zero-md@2/dist/zero-md.min.js"></script>
</head>
<body>
<zero-md id="app" src="example.md" manual-render>
<!-- Append CSS required for line-numbers -->
<template data-merge="append">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/PrismJS/prism@1/plugins/line-numbers/prism-line-numbers.css">
</template>
</zero-md>
<script>
const app = document.querySelector('#app')
// Listen to the ready event
app.addEventListener('zero-md-ready', () => {
// Then add the `line-numbers` class onto markdown body
app.render({ classes: 'line-numbers' })
})
</script>
</body>
```
Repro: https://plnkr.co/edit/Rxvp5ShGacyTAIh5
### Add Copy-to-Clipboard button
In this recipe, a `Copy` button can be automatically added to all code blocks (like how it is in these docs)
using Prism's [`toolbar`](https://prismjs.com/plugins/toolbar/) and
[`copy-to-clipboard`](https://prismjs.com/plugins/copy-to-clipboard/) plugins.
```html
<head>
<script>
// Make use of global config object to change default options
window.ZeroMdConfig = {
prismUrl: [
// Default Prism URLs
['https://cdn.jsdelivr.net/gh/PrismJS/prism@1/prism.min.js', 'data-manual'],
'https://cdn.jsdelivr.net/gh/PrismJS/prism@1/plugins/autoloader/prism-autoloader.min.js',
// Also load Prism's `toolbar` and `copy-to-clipboard` plugins
'https://cdn.jsdelivr.net/gh/PrismJS/prism@1/plugins/toolbar/prism-toolbar.min.js',
'https://cdn.jsdelivr.net/gh/PrismJS/prism@1/plugins/copy-to-clipboard/prism-copy-to-clipboard.min.js'
],
cssUrls: [
// Default stylesheets
'https://cdn.jsdelivr.net/gh/sindresorhus/github-markdown-css@4/github-markdown.min.css',
'https://cdn.jsdelivr.net/gh/PrismJS/prism@1/themes/prism.min.css',
// Include CSS for `toolbar` plugin
'https://cdn.jsdelivr.net/gh/PrismJS/prism@1/plugins/toolbar/prism-toolbar.min.css'
]
}
</script>
<script type="module" src="https://cdn.jsdelivr.net/gh/zerodevx/zero-md@2/dist/zero-md.min.js"></script>
</head>
<body>
<zero-md src="fixture.md"></zero-md>
</body>
```
Repro: https://plnkr.co/edit/quiZ7THsQRypBcKL