yankeeinlondon/markdown-it-collapsible

Markdown-it-collapsible is a plugin that lets you create expandable "click to reveal" sections in documents written with markdown. If you've ever seen a webpage where a heading has a little arrow next to it and clicking it unfolds hidden text, this tool does exactly that. It gives writers a simple way to tuck away detailed information, spoilers, or lengthy answers until the reader actually wants to see them. The plugin works by adding a new shorthand to the markdown writing process. Instead of writing complex code, a writer simply types three plus signs, the text they want visible (like "Click me!"), the text they want to hide, and then three more plus signs to close it off. When the document is converted into a webpage, the plugin translates that shorthand into the standard web elements responsible for interactive collapsing sections. The result is a clean, clickable bar that expands to show the hidden content. Anyone who writes documentation, builds wikis, or creates content using markdown would find this useful. For example, a product manager writing a help guide could use it to hide advanced troubleshooting steps, keeping the main page clean and focused. A teacher publishing course notes online could hide hints to a problem so students only see them after trying the solution themselves. It is essentially a formatting tool for organizing long pages and making them less overwhelming. The project is designed to be straightforward. It includes optional styling suggestions to customize the look of the expanding arrows and spacing, though the README does not go into detail about advanced configuration. It is a focused utility that does one specific job for people already using markdown to generate web content.