Clean URLs

Point your server at extensionless URLs so /about resolves to /about.html.

Sparke just fetch()es whatever URL you link to. For extensionless URLs like /about, your server must resolve them to /about.html, or the browser fallback would 404. This is a one-time server config.

Server config

nginxnginx

location / { try_files $uri $uri.html $uri/ =404; }

Caddynginx

try_files {{path}} {{path}}.html {{path}}/

Apache (.htaccess)apache

# simplest:
Options +MultiViews

Static hosts

Netlify serves about.html at /about by default.
Vercel: set "cleanUrls": true.
GitHub Pages has no rewrites – use folder pages (about/index.html).

For local development of the project's demo, the included serve.py does the same extensionless fallback. (This site uses folder pages, so it runs anywhere.)