add preventDefault support for all inital event types (show, close, hide, etc.) + fix small bug with scrollspy.last

docs/assets/js/bootstrap-carousel.js

@@ -86,6 +86,7 @@
         , direction = type == 'next' ? 'left' : 'right'
         , fallback  = type == 'next' ? 'first' : 'last'
         , that = this
+        , e = $.Event('slide')
 
       this.sliding = true
 
@@ -96,11 +97,12 @@
       if ($next.hasClass('active')) return
 
       if ($.support.transition && this.$element.hasClass('slide')) {
+        this.$element.trigger(e)
+        if (e.isDefaultPrevented()) return
         $next.addClass(type)
         $next[0].offsetWidth // force reflow
         $active.addClass(direction)
         $next.addClass(direction)
-        this.$element.trigger('slide')
         this.$element.one($.support.transition.end, function () {
           $next.removeClass([type, direction].join(' ')).addClass('active')
           $active.removeClass(['active', direction].join(' '))
@@ -108,7 +110,8 @@
           setTimeout(function () { that.$element.trigger('slid') }, 0)
         })
       } else {
-        this.$element.trigger('slide')
+        this.$element.trigger(e)
+        if (e.isDefaultPrevented()) return
         $active.removeClass('active')
         $next.addClass('active')
         this.sliding = false