Make it look just like WordPress's Favorite plugin

Text for add link = ? Favorite

tick “Show remove link “

Text for remove link = <span class=”heart”>? Favorited</span>

tick “Show add link “

Then, in your stylesheet, add this css

a.wpfp-link:hover {
color: #900
}

span.heart {
		color: #900;
}

Hope someone likes it.

https://www.ads-software.com/extend/plugins/wp-favorite-posts/