diff --git a/dist/example/router.min.js b/dist/example/router.min.js
index 0343c5fb..8e1b454f 100644
--- a/dist/example/router.min.js
+++ b/dist/example/router.min.js
@@ -3,4 +3,4 @@
  * Copyright 2016
  * Licensed under the  MIT license
  */
-!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define("Router",[],t):"object"==typeof exports?exports.Router=t():e.Router=t()}(this,function(){return function(e){function t(o){if(n[o])return n[o].exports;var r=n[o]={exports:{},id:o,loaded:!1};return e[o].call(r.exports,r,r.exports,t),r.loaded=!0,r.exports}var n={};return t.m=e,t.c=n,t.p="",t(0)}([function(e,t,n){"use strict";function o(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var n in e)Object.prototype.hasOwnProperty.call(e,n)&&(t[n]=e[n]);return t["default"]=e,t}function r(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}Object.defineProperty(t,"__esModule",{value:!0});var i=function(){function e(e,t){for(var n=0;n<t.length;n++){var o=t[n];o.enumerable=o.enumerable||!1,o.configurable=!0,"value"in o&&(o.writable=!0),Object.defineProperty(e,o.key,o)}}return function(t,n,o){return n&&e(t.prototype,n),o&&e(t,o),t}}(),s=n(1),a=o(s),u=function(){function e(t){r(this,e),this._options={container:"#container",enter:"enter",enterTimeout:0,leave:"leave",leaveTimeout:0},this._index=1,this._$container=null,this._routes=[],this._default=null,this._options=a.extend(this._options,t),this._$container=document.querySelector(this._options.container)}return i(e,[{key:"init",value:function(){var e=this;window.addEventListener("hashchange",function(t){var n=a.getHash(t.newURL),o=history.state||{};e.go(n,o._index<=e._index)},!1),history.state&&history.state._index&&(this._index=history.state._index),this._index--;var t=a.getHash(location.href),n=this._getRoute(t);return this.go(n?t:this._default),this}},{key:"push",value:function(e){return e=a.extend({url:"*",className:"",render:a.noop,bind:a.noop},e),this._routes.push(e),this}},{key:"setDefault",value:function(e){return this._default=e,this}},{key:"go",value:function(e){var t=this,n=arguments.length<=1||void 0===arguments[1]?!1:arguments[1],o=this._getRoute(e);if(!o)throw new Error("url "+e+" was not found");return!function(){var r="function"==typeof o.render?o.render(o.params):"",i=t._$container.hasChildNodes();i&&!function(){var e=t._$container.childNodes[0];n&&e.classList.add(t._options.leave),t._options.leaveTimeout>0?setTimeout(function(){e.parentNode.removeChild(e)},t._options.leaveTimeout):e.parentNode.removeChild(e)}();var s=document.createElement("div");o.className&&s.classList.add(o.className),s.innerHTML=r,t._$container.appendChild(s),!n&&t._options.enter&&i&&s.classList.add(t._options.enter),t._options.enterTimeout>0?setTimeout(function(){s.classList.remove(t._options.enter)},t._options.enterTimeout):s.classList.remove(t._options.enter),location.hash="#"+e;try{n?t._index--:t._index++,history.replaceState&&history.replaceState({_index:t._index},"",location.href)}catch(a){}"function"!=typeof o.bind||o.__isBind||(o.bind.call(s),o.__isBind=!0)}(),this}},{key:"_getRoute",value:function(e){for(var t=0,n=this._routes.length;n>t;t++){var o=this._routes[t],r=a.getRegExp(o.url),i=a.getParams(o.url),s=r.exec(e);if(s){o.params={};for(var u=0,c=i.length;c>u;u++){var l=i[u];o.params[l]=s[u+1]}return o}}return null}}]),e}();t["default"]=u,e.exports=t["default"]},function(e,t){"use strict";function n(e,t){for(var n in t)e[n]=t[n];return e}function o(e){return-1!==e.indexOf("#")?e.substring(e.indexOf("#")+1):"/"}function r(){}function i(e){var t=/\((.*?)\)/g,n=/(\(\?)?:\w+/g,o=/\*\w+/g,r=/[\-{}\[\]+?.,\\\^$|#\s]/g;return e=e.replace(r,"\\$&").replace(t,"(?:$1)?").replace(n,function(e,t){return t?e:"([^/?]+)"}).replace(o,"([^?]*?)"),new RegExp("^"+e+"(?:\\?([\\s\\S]*))?$")}function s(e){for(var t=/:(\w+)/g,n=[],o=void 0;null!==(o=t.exec(e));)n.push(o[1]);return n}Object.defineProperty(t,"__esModule",{value:!0}),t.extend=n,t.getHash=o,t.noop=r,t.getRegExp=i,t.getParams=s}])});
\ No newline at end of file
+!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define("Router",[],t):"object"==typeof exports?exports.Router=t():e.Router=t()}(this,function(){return function(e){function t(r){if(n[r])return n[r].exports;var o=n[r]={exports:{},id:r,loaded:!1};return e[r].call(o.exports,o,o.exports,t),o.loaded=!0,o.exports}var n={};return t.m=e,t.c=n,t.p="",t(0)}([function(e,t,n){"use strict";function r(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var n in e)Object.prototype.hasOwnProperty.call(e,n)&&(t[n]=e[n]);return t["default"]=e,t}function o(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}Object.defineProperty(t,"__esModule",{value:!0});var i=Object.assign||function(e){for(var t=1;t<arguments.length;t++){var n=arguments[t];for(var r in n)Object.prototype.hasOwnProperty.call(n,r)&&(e[r]=n[r])}return e},a=function(){function e(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}return function(t,n,r){return n&&e(t.prototype,n),r&&e(t,r),t}}(),u=n(1),s=r(u),l=function(){function e(t){o(this,e),this._options={container:"#container",enter:"enter",enterTimeout:0,leave:"leave",leaveTimeout:0},this._index=1,this._$container=null,this._routes=[],this._default=null,this._options=i({},this._options,t),this._$container=document.querySelector(this._options.container)}return a(e,[{key:"init",value:function(){var e=this;window.addEventListener("hashchange",function(t){var n=s.getHash(t.newURL),r=history.state||{};e.go(n,r._index<=e._index)},!1),history.state&&history.state._index&&(this._index=history.state._index),this._index--;var t=s.getHash(location.href),n=s.getRoute(this._routes,t);return this.go(n?t:this._default),this}},{key:"push",value:function(e){var t=this._routes.filter(function(t){return t.url===e.url})[0];if(t)throw new Error("route 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a=document.createElement("div");r.className&&a.classList.add(r.className),a.innerHTML=i,t._$container.appendChild(a),!n&&t._options.enter&&o&&a.classList.add(t._options.enter),t._options.enterTimeout>0?setTimeout(function(){a.classList.remove(t._options.enter)},t._options.enterTimeout):a.classList.remove(t._options.enter),location.hash="#"+e;try{n?t._index--:t._index++,history.replaceState&&history.replaceState({_index:t._index},"",location.href)}catch(u){}"function"==typeof r.bind&&r.bind.call(a)},a=s.hasChildren(t._$container);o(a);var u=function(e){var t=arguments.length<=1||void 0===arguments[1]?"":arguments[1];if(e)throw e;i(a,t)},l=r.render(u);l&&"function"==typeof l.then?l.then(function(e){u(null,e)},u):0===r.render.length&&u(null,l)}(),this}}]),e}();t["default"]=l,e.exports=t["default"]},function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{"default":e}}function o(e){return-1!==e.indexOf("#")?e.substring(e.indexOf("#")+1):"/"}function i(e,t){for(var n=0,r=e.length;r>n;n++){var o=e[n],i=[],a=(0,l["default"])(o.url,i),u=a.exec(t);if(u){o.params={};for(var s=0,c=i.length;c>s;s++){var f=i[s],p=f.name;o.params[p]=u[s+1]}return o}}return null}function a(e){var t=e.children;return t.length>0}function u(){}Object.defineProperty(t,"__esModule",{value:!0}),t.getHash=o,t.getRoute=i,t.hasChildren=a,t.noop=u;var s=n(2),l=r(s)},function(e,t,n){function r(e){for(var t,n=[],r=0,o=0,i="";null!=(t=x.exec(e));){var a=t[0],u=t[1],l=t.index;if(i+=e.slice(o,l),o=l+a.length,u)i+=u[1];else{var c=e[o],f=t[2],p=t[3],h=t[4],d=t[5],v=t[6],g=t[7];null!=f&&null!=c&&c!==f&&(i+=f,f=null),i&&(n.push(i),i="");var y="+"===v||"*"===v,_="?"===v||"*"===v,m=t[2]||"/",w=h||d||(g?".*":"[^"+m+"]+?");n.push({name:p||r++,prefix:f||"",delimiter:m,optional:_,repeat:y,pattern:s(w)})}}return o<e.length&&(i+=e.substr(o)),i&&n.push(i),n}function o(e){return a(r(e))}function i(e){return encodeURI(e).replace(/[\/?#'"]/g,function(e){return"%"+e.charCodeAt(0).toString(16).toUpperCase()})}function a(e){for(var t=new Array(e.length),n=0;n<e.length;n++)"object"==typeof e[n]&&(t[n]=new RegExp("^"+e[n].pattern+"$"));return function(n,r){for(var o="",a=n||{},u=r||{},s=u.pretty?i:encodeURIComponent,l=0;l<e.length;l++){var c=e[l];if("string"!=typeof c){var f,p=a[c.name];if(null==p){if(c.optional)continue;throw new TypeError('Expected "'+c.name+'" to be defined')}if(g(p)){if(!c.repeat)throw new TypeError('Expected "'+c.name+'" to not repeat, but received "'+p+'"');if(0===p.length){if(c.optional)continue;throw new TypeError('Expected "'+c.name+'" to not be empty')}for(var h=0;h<p.length;h++){if(f=s(p[h]),!t[l].test(f))throw new TypeError('Expected all "'+c.name+'" to match "'+c.pattern+'", but received "'+f+'"');o+=(0===h?c.prefix:c.delimiter)+f}}else{if(f=s(p),!t[l].test(f))throw new TypeError('Expected "'+c.name+'" to match "'+c.pattern+'", but received 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n||(o=(a?o.slice(0,-2):o)+"(?:\\/(?=$))?"),o+=r?"$":n&&a?"":"(?=\\/|$)",new RegExp("^"+o,c(t))}function v(e,t,n){return t=t||[],g(t)?n||(n={}):(n=t,t=[]),e instanceof RegExp?f(e,t):g(e)?p(e,t,n):h(e,t,n)}var g=n(3);e.exports=v,e.exports.parse=r,e.exports.compile=o,e.exports.tokensToFunction=a,e.exports.tokensToRegExp=d;var x=new RegExp(["(\\\\.)","([\\/.])?(?:(?:\\:(\\w+)(?:\\(((?:\\\\.|[^()])+)\\))?|\\(((?:\\\\.|[^()])+)\\))([+*?])?|(\\*))"].join("|"),"g")},function(e,t){e.exports=Array.isArray||function(e){return"[object Array]"==Object.prototype.toString.call(e)}}])});
\ No newline at end of file
diff --git a/src/example/router.min.js b/src/example/router.min.js
index 0343c5fb..8e1b454f 100644
--- a/src/example/router.min.js
+++ b/src/example/router.min.js
@@ -3,4 +3,4 @@
  * Copyright 2016
  * Licensed under the  MIT license
  */
-!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define("Router",[],t):"object"==typeof exports?exports.Router=t():e.Router=t()}(this,function(){return function(e){function t(o){if(n[o])return n[o].exports;var r=n[o]={exports:{},id:o,loaded:!1};return e[o].call(r.exports,r,r.exports,t),r.loaded=!0,r.exports}var n={};return t.m=e,t.c=n,t.p="",t(0)}([function(e,t,n){"use strict";function o(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var n in e)Object.prototype.hasOwnProperty.call(e,n)&&(t[n]=e[n]);return t["default"]=e,t}function r(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}Object.defineProperty(t,"__esModule",{value:!0});var i=function(){function e(e,t){for(var n=0;n<t.length;n++){var o=t[n];o.enumerable=o.enumerable||!1,o.configurable=!0,"value"in o&&(o.writable=!0),Object.defineProperty(e,o.key,o)}}return function(t,n,o){return n&&e(t.prototype,n),o&&e(t,o),t}}(),s=n(1),a=o(s),u=function(){function e(t){r(this,e),this._options={container:"#container",enter:"enter",enterTimeout:0,leave:"leave",leaveTimeout:0},this._index=1,this._$container=null,this._routes=[],this._default=null,this._options=a.extend(this._options,t),this._$container=document.querySelector(this._options.container)}return i(e,[{key:"init",value:function(){var e=this;window.addEventListener("hashchange",function(t){var n=a.getHash(t.newURL),o=history.state||{};e.go(n,o._index<=e._index)},!1),history.state&&history.state._index&&(this._index=history.state._index),this._index--;var t=a.getHash(location.href),n=this._getRoute(t);return this.go(n?t:this._default),this}},{key:"push",value:function(e){return e=a.extend({url:"*",className:"",render:a.noop,bind:a.noop},e),this._routes.push(e),this}},{key:"setDefault",value:function(e){return this._default=e,this}},{key:"go",value:function(e){var t=this,n=arguments.length<=1||void 0===arguments[1]?!1:arguments[1],o=this._getRoute(e);if(!o)throw new Error("url "+e+" was not found");return!function(){var r="function"==typeof o.render?o.render(o.params):"",i=t._$container.hasChildNodes();i&&!function(){var e=t._$container.childNodes[0];n&&e.classList.add(t._options.leave),t._options.leaveTimeout>0?setTimeout(function(){e.parentNode.removeChild(e)},t._options.leaveTimeout):e.parentNode.removeChild(e)}();var s=document.createElement("div");o.className&&s.classList.add(o.className),s.innerHTML=r,t._$container.appendChild(s),!n&&t._options.enter&&i&&s.classList.add(t._options.enter),t._options.enterTimeout>0?setTimeout(function(){s.classList.remove(t._options.enter)},t._options.enterTimeout):s.classList.remove(t._options.enter),location.hash="#"+e;try{n?t._index--:t._index++,history.replaceState&&history.replaceState({_index:t._index},"",location.href)}catch(a){}"function"!=typeof o.bind||o.__isBind||(o.bind.call(s),o.__isBind=!0)}(),this}},{key:"_getRoute",value:function(e){for(var t=0,n=this._routes.length;n>t;t++){var o=this._routes[t],r=a.getRegExp(o.url),i=a.getParams(o.url),s=r.exec(e);if(s){o.params={};for(var u=0,c=i.length;c>u;u++){var l=i[u];o.params[l]=s[u+1]}return o}}return null}}]),e}();t["default"]=u,e.exports=t["default"]},function(e,t){"use strict";function n(e,t){for(var n in t)e[n]=t[n];return e}function o(e){return-1!==e.indexOf("#")?e.substring(e.indexOf("#")+1):"/"}function r(){}function i(e){var t=/\((.*?)\)/g,n=/(\(\?)?:\w+/g,o=/\*\w+/g,r=/[\-{}\[\]+?.,\\\^$|#\s]/g;return e=e.replace(r,"\\$&").replace(t,"(?:$1)?").replace(n,function(e,t){return t?e:"([^/?]+)"}).replace(o,"([^?]*?)"),new RegExp("^"+e+"(?:\\?([\\s\\S]*))?$")}function s(e){for(var t=/:(\w+)/g,n=[],o=void 0;null!==(o=t.exec(e));)n.push(o[1]);return n}Object.defineProperty(t,"__esModule",{value:!0}),t.extend=n,t.getHash=o,t.noop=r,t.getRegExp=i,t.getParams=s}])});
\ No newline at end of file
+!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define("Router",[],t):"object"==typeof exports?exports.Router=t():e.Router=t()}(this,function(){return function(e){function t(r){if(n[r])return n[r].exports;var o=n[r]={exports:{},id:r,loaded:!1};return e[r].call(o.exports,o,o.exports,t),o.loaded=!0,o.exports}var n={};return t.m=e,t.c=n,t.p="",t(0)}([function(e,t,n){"use strict";function r(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var n in e)Object.prototype.hasOwnProperty.call(e,n)&&(t[n]=e[n]);return t["default"]=e,t}function o(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}Object.defineProperty(t,"__esModule",{value:!0});var i=Object.assign||function(e){for(var t=1;t<arguments.length;t++){var n=arguments[t];for(var r in n)Object.prototype.hasOwnProperty.call(n,r)&&(e[r]=n[r])}return e},a=function(){function e(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}return function(t,n,r){return n&&e(t.prototype,n),r&&e(t,r),t}}(),u=n(1),s=r(u),l=function(){function e(t){o(this,e),this._options={container:"#container",enter:"enter",enterTimeout:0,leave:"leave",leaveTimeout:0},this._index=1,this._$container=null,this._routes=[],this._default=null,this._options=i({},this._options,t),this._$container=document.querySelector(this._options.container)}return a(e,[{key:"init",value:function(){var e=this;window.addEventListener("hashchange",function(t){var n=s.getHash(t.newURL),r=history.state||{};e.go(n,r._index<=e._index)},!1),history.state&&history.state._index&&(this._index=history.state._index),this._index--;var t=s.getHash(location.href),n=s.getRoute(this._routes,t);return this.go(n?t:this._default),this}},{key:"push",value:function(e){var t=this._routes.filter(function(t){return t.url===e.url})[0];if(t)throw new Error("route 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