HTML to expand / collapse div sections

To use a A link as a button we can href="#self", please note that href="# makes browser jump to top of page. And href="javascript:void(0)" is too comebersome. Sources: * Href attribute for JavaScript links: # or javascript:void(0)? * how to prevent javascript div popup from jumping back to the top of the page?

To enable collapse / expand in Java Script, please use sample from How to hide, show, or toggle your div

Useful: * Markdown help * [Create element with markdown (kramdown)](

In the end, i think using button to expand / collapse div sections is more elegant approach.