This is probably a really basic question but I'm having troubles with it. I want to create a passage that has expandable/collapsible text within it. Basically, I have a passage that is a fictional magazine article with several headings/sections within. The entire article on one page is a bit overwhelming for a reader, but it does need to be read in a linear manner. So I thought of having the headings as a list of links, and clicking on the heading would expand its section's text (clicking again collapsing it). Kind of like how Wikipedia works on mobile devices.