in templates/ydotm/bootstrap3.js [1550:1567]
function ScrollSpy(element, options) {
var href
var process = $.proxy(this.process, this)
this.$element = $(element).is('body') ? $(window) : $(element)
this.$body = $('body')
this.$scrollElement = this.$element.on('scroll.bs.scroll-spy.data-api', process)
this.options = $.extend({}, ScrollSpy.DEFAULTS, options)
this.selector = (this.options.target
|| ((href = $(element).attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '')) //strip for ie7
|| '') + ' .nav li > a'
this.offsets = $([])
this.targets = $([])
this.activeTarget = null
this.refresh()
this.process()
}