What do you mean by Bootstrap collapsing elements?

Bootstrap collapsing elements is a way in which you can collapse any specific element without developing any JavaScript code or even an accordion markup. Now, in order to implement this element, you need to add data-toggle="collapse"  in the controller element. To automatically assign the control of the collapsible element, you can use data-target or href along with data-toggle="collapse". There are other options also available such as .collapse (options), .collapse ('hide'), .collapse ('show')