Bootstrap JS plugin folding (collapse)

data-toggle= "Collapse"--indicates that the element has a folding function;

The data-target--sets the element link that is pointed to when the element opens collapsed.

The. collapse--is used to set elements as collapsed content.

. in--sets the collapsed content to be initialized to the display state;

The. panel-collapse--indicates that the element content is a collapsed panel style.

For many other details, please refer to the Demo sample:

<! DOCTYPE html>

 
Bootstrap JS plugin folding (collapse)