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exports===\"object\"&&typeof module!==\"undefined\"){module.exports=f()}else if(typeof define===\"function\"&&define.amd){define([],f)}else{var g;if(typeof window!==\"undefined\"){g=window}else if(typeof global!==\"undefined\"){g=global}else if(typeof self!==\"undefined\"){g=self}else{g=this}g.snabbdom_eventlisteners = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){\nfunction invokeHandler(handler, vnode, event) {\n  if (typeof handler === \"function\") {\n    // call function handler\n    handler.call(vnode, event, vnode);\n  } else if (typeof handler === \"object\") {\n    // call handler with arguments\n    if (typeof handler[0] === \"function\") {\n      // special case for single argument for performance\n      if (handler.length === 2) {\n        handler[0].call(vnode, handler[1], event, vnode);\n      } else {\n        var args = handler.slice(1);\n        args.push(event);\n        args.push(vnode);\n        handler[0].apply(vnode, args);\n      }\n    } else {\n      // call multiple handlers\n      for (var i = 0; i < handler.length; i++) {\n        invokeHandler(handler[i]);\n      }\n    }\n  }\n}\n\nfunction handleEvent(event, vnode) {\n  var name = event.type,\n      on = vnode.data.on;\n\n  // call event handler(s) if exists\n  if (on && on[name]) {\n    invokeHandler(on[name], vnode, event);\n  }\n}\n\nfunction createListener() {\n  return function handler(event) {\n    handleEvent(event, handler.vnode);\n  }\n}\n\nfunction updateEventListeners(oldVnode, vnode) {\n  var oldOn = oldVnode.data.on,\n      oldListener = oldVnode.listener,\n      oldElm = oldVnode.elm,\n      on = vnode && vnode.data.on,\n      elm = vnode && vnode.elm,\n      name;\n\n  // optimization for reused immutable handlers\n  if (oldOn === on) {\n    return;\n  }\n\n  // remove existing listeners which no longer used\n  if (oldOn && oldListener) {\n    // if element changed or deleted we remove all existing listeners unconditionally\n    if (!on) {\n      for (name in oldOn) {\n        // remove listener if element was changed or existing listeners removed\n        oldElm.removeEventListener(name, oldListener, false);\n      }\n    } else {\n      for (name in oldOn) {\n        // remove listener if existing listener removed\n        if (!on[name]) {\n          oldElm.removeEventListener(name, oldListener, false);\n        }\n      }\n    }\n  }\n\n  // add new listeners which has not already attached\n  if (on) {\n    // reuse existing listener or create new\n    var listener = vnode.listener = oldVnode.listener || createListener();\n    // update vnode for listener\n    listener.vnode = vnode;\n\n    // if element changed or added we add all needed listeners unconditionally\n    if (!oldOn) {\n      for (name in on) {\n        // add listener if element was changed or new listeners added\n        elm.addEventListener(name, listener, false);\n      }\n    } else {\n      for (name in on) {\n        // add listener if new listener added\n        if (!oldOn[name]) {\n          elm.addEventListener(name, listener, false);\n        }\n      }\n    }\n  }\n}\n\nmodule.exports = {\n  create: updateEventListeners,\n  update: updateEventListeners,\n  destroy: updateEventListeners\n};\n\n},{}]},{},[1])(1)\n});\n//# 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