<!DOCTYPE html> <html> <head> <title>Details/summary</title> </head> <body> <h1>Details/summary are interactive</h1> <details> <summary>Clicking this toggles the element</summary> <p>You can have any content down here.<p> <p>Multiple elements, whatever you want.<p> </details> <details open> <summary>They also can be open to start</summary> <p>This will already be visible.<p> </details> </body> </html>