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 ...
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.
DOMtastic
Small, fast, and modular DOM & Event library for modern browsers.
A one-line solution to highlighting search matches
Another great post on Frontend Development written by Ire Aderinokun, Frontend Developer and User Interface Designer. In this article she shows us how to highlighting search matches.
