JSFiddle - React, Tailwind, and code Playground

HTML

<a id="thumblink-10">Hover</div>

<div id="thumb-hover-10" style="display: none;">Content</div>

JavaScript

jQuery("a[id^='thumblink-']").live('hover', function(){
    var num = this.id.split('-')[1];
    jQuery('#thumb-hover-' + num).toggle();
});