Check this post written by Chris Coyier on mailto: links. "It's pretty easy to use, but as with anything web, there are lots of things to consider."
You may also be interested in ...
Protomaps
Protomaps is an open source map of the world, deployable as a single static file on cloud storage.
Slinkity
Slinkity is a plugin that can extend any 11ty site. Unlocks component frameworks (React, Vue, and Svelte) for writing page templates and layout templates. Includes powerful shortcodes to insert components into existing pages. Hydrates these component-driven pages on the client. (Optionally) Turns your site into a single page app.
Prism
Prism is a lightweight, extensible syntax highlighter, built with modern web standards in mind. It’s used in thousands of websites, including some of those you visit daily.
