in templates/ydotm/bootstrap3.js [1830:1842]
var Affix = function (element, options) {
this.options = $.extend({}, Affix.DEFAULTS, options)
this.$window = $(window)
.on('scroll.bs.affix.data-api', $.proxy(this.checkPosition, this))
.on('click.bs.affix.data-api', $.proxy(this.checkPositionWithEventLoop, this))
this.$element = $(element)
this.affixed =
this.unpin =
this.pinnedOffset = null
this.checkPosition()
}