Function isHandlerShared

sprint.js:358–370

(el, event, registeredHandler)

  var removeEvent = (function() {
    var isHandlerShared = function(el, event, registeredHandler) {
      var similarEventsHandlers = Object.keys(getEvents(el)).filter(function(prop) {
        return getEventFromNamespace(event) === getEventFromNamespace(prop)
      }).map(function(ev) {
        return getEvents(el)[ev]
      }).reduce(function(a, b) {
        return a.concat(b)
      }).filter(function(handler) {
        return handler === registeredHandler
      })
      if (similarEventsHandlers.length < 2) return false
      return true
    }
    var removeListener = function(el, event, namedHandler) {
      return function(registeredHandler) {
        if (namedHandler && namedHandler !== registeredHandler) return