Twitter Bootstrap Collapse plugin Direction—Horizontal instead of Vertical

Question

Is there a way to collapse the the Bootstrap Collapse plugin from horizontally instead of vertically? Looking at the code this ability doesn\'t seem to be built in, but I\'m

Answer 1

In my version of bootstrap 3 (using LESS), I simply had to include this in my global less file:

.collapsing.width  { 
    width: 0;
    height: auto;
    .transition(width 0.35s ease);
}

The extra class has to be width since the collapse.js looks for this class for the transition. I tried everyone else's suggestions, but they didn't work for me.