Function signal

external/.scrollLibs.js:1968–1977

(emitter, type /*, values...*/)

  }

  function signal(emitter, type /*, values...*/) {
    var handlers = getHandlers(emitter, type)
    if (!handlers.length) {
      return
    }
    var args = Array.prototype.slice.call(arguments, 2)
    for (var i = 0; i < handlers.length; ++i) {
      handlers[i].apply(null, args)
    }
  }

  // The DOM events that CodeMirror handles can be overridden by
  // registering a (non-DOM) handler on the editor for the event name,