NoFrameworkAdapter.prototype.on = function()

in website/content/javascripts/book.js [720:729]


  NoFrameworkAdapter.prototype.on = function(event, handler) {
    var eventParts = event.split('.')
    var eventType = eventParts[0]
    var namespace = eventParts[1] || '__default'
    var nsHandlers = this.handlers[namespace] = this.handlers[namespace] || {}
    var nsTypeList = nsHandlers[eventType] = nsHandlers[eventType] || []

    nsTypeList.push(handler)
    this.element.addEventListener(eventType, handler)
  }