The article mentions in-browser search, which as mentioned is often sufficient for small sites. For reference, my site [0], generated on hexo using the icarus theme [1] uses what appears to be the `inferno` package's insight search class [2] to accomplish this without needing to make any requests back to Netlify. I was pretty impressed by the responsiveness and ease-of-setup.
[0] https://matansilver.com
[1] https://github.com/ppoffice/hexo-theme-icarus
[2] https://blog.zhangruipeng.me/hexo-component-inferno/module-v...