Javascript foldable area implementation code

Key to technical implementation: the display feature of CSS is used. The value of the display feature is none and block. None is hidden, and block is displayed.

Previous design: The foldable area is divided into two areas: the title bar and content area. The title bar is always visible, and the content part can be folded or expanded. On the page, you can use two <div> elements to implement this design.

Steps:
Insert the <div> element into the page and add the JS to implement the folding function.CodeThe Code is as follows:Xmlns = "http://www.w3.org/1999/xhtml">

Click herethis is some content to show and hide.

Click herethis is some content to show and hide.