How to use the @sveltejs/site-kit/utils/markdown.extract_metadata function in @sveltejs/site-kit
To help you get started, we’ve selected a few @sveltejs/site-kit examples, based on popular ways it is used in public projects.
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sveltejs / svelte / site / src / routes / tutorial / [slug] / index.json.js View on Github 
renderer.code = (source, lang) => {
source = source.replace(/^ +/gm, match =>
match.split(' ').join('\t')
);
const lines = source.split('\n');
const meta = extract_metadata(lines[0], lang);
let prefix = '';
let className = 'code-block';
if (meta) {
source = lines.slice(1).join('\n');
const filename = meta.filename || (lang === 'html' && 'App.svelte');
if (filename) {
prefix = `<span class="filename">${prefix} ${filename}</span>`;
className += ' named';
}
}
return `<div class="${className}">${prefix}${highlight(source, lang)}</div>`;
};@sveltejs/site-kit
Styles and components for use in *.svelte.dev websites
