This plugin is coded in JavaScript and CSS. It has been designed in such a way that it won't load until your entire webpage is loaded. It is lightweight and won't affect your page load time. This plugin is SEO friendly and will help to rank your page in search engines. This plugin contains a toggle button to hide and unhide TOC. It is highly customizable and responsive. The best part is, this plugin executes only when invoked. That is you can enable or disable TOC on a specific page or post.