CSS: Add Icon to Links

You can add a little icon to links to indicate what type of link it is.

For example, suppose you have links to Twitter like this:

<a href="https://x.com/xah_lee">Xah Lee</a>

And you want browser to show a icon, like this

https://x.com/xah_lee

Instead of using a img tag for each link, you should use CSS to add them, by matching the URL.

Here is the CSS code:

a[href*="x.com/"] {
background:url(https://x.com/favicon.ico) no-repeat left center;
padding-left:38px;
}

The CSS selector a[href*="x.com/"] matches URL. 〔see CSS: Selector: Match Attribute〕