mifi
911093f0b6
- Migrates the site to Svelte 5 - Still generates a static site with inlined critical path CSS for the ultimate in performance - Opens up future possibilities for site growth Reviewed-on: #1 Co-authored-by: mifi <badmf@mifi.dev> Co-committed-by: mifi <badmf@mifi.dev>
72 lines
2.2 KiB
JavaScript
72 lines
2.2 KiB
JavaScript
#!/usr/bin/env node
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/**
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* Post-build: inline critical CSS in dist/*.html (SvelteKit adapter-static output).
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* Runs after vite build; Critters reads/writes relative to dist/.
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*
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* Critters with preload:'swap' adds onload but does not set rel="preload" as="style",
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* so the link stays render-blocking. We fix that in postProcessSwapLinks().
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*/
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import Critters from 'critters';
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import fs from 'fs';
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import path from 'path';
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import { fileURLToPath } from 'url';
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const __dirname = path.dirname(fileURLToPath(import.meta.url));
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const ROOT = path.join(__dirname, '..');
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const DIST = path.join(ROOT, 'dist');
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/**
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* Critters leaves rel="stylesheet" on swap links; change to rel="preload" as="style"
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* so the full CSS loads async and only applies on load (non-blocking).
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*/
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// function postProcessSwapLinks(html) {
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// return html.replace(/<link\s+([^>]*)>/gi, (full, attrs) => {
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// if (
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// !/rel="stylesheet"/i.test(attrs) ||
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// !/onload="this\.rel='stylesheet'"/i.test(attrs)
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// ) {
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// return full;
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// }
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// const fixed = attrs
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// .replace(/\brel="stylesheet"\s*/i, 'rel="preload" as="style" ')
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// .replace(
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// /\bonload="this\.rel='stylesheet'"/i,
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// 'onload="this.onload=null;this.rel=\'stylesheet\'"',
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// );
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// return `<link ${fixed}>`;
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// });
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// }
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async function main() {
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if (!fs.existsSync(DIST)) {
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console.error('dist/ not found. Run vite build first.');
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process.exit(1);
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}
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const critters = new Critters({
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path: DIST,
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preload: 'default',
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noscriptFallback: true,
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pruneSource: false,
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logLevel: 'warn',
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});
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const files = fs.readdirSync(DIST).filter((f) => f.endsWith('.html'));
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for (const file of files) {
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const filePath = path.join(DIST, file);
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let html = fs.readFileSync(filePath, 'utf8');
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html = await critters.process(html);
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// html = postProcessSwapLinks(html);
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fs.writeFileSync(filePath, html, 'utf8');
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console.log('✓ Critical CSS inlined → dist/' + file);
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}
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console.log('Critical CSS step complete.');
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}
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main().catch((err) => {
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console.error(err);
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process.exit(1);
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});
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