https://bostonbyfoot.org/common/js/jquery.onhashchange.min.js

1(function($,window,undefined){'$:nomunge';var str_hashchange='hashchange',doc=document,fake_onhashchange,special=$.event.special,doc_mode=doc.documentMode,supports_onhashchange='on'+str_hashchange in window&&(doc_mode===undefined||doc_mode>7);function get_fragment(url){url=url||location.href;return'#'+url.replace(/^[^#]*#?(.*)$/,'$1');};$.fn[str_hashchange]=function(fn){return fn?this.bind(str_hashchange,fn):this.trigger(str_hashchange);};$.fn[str_hashchange].delay=50;special[str_hashchange]=$.extend(special[str_hashchange],{setup:function(){if(supports_onhashchange){return false;}
2$(fake_onhashchange.start);},teardown:function(){if(supports_onhashchange){return false;}
3$(fake_onhashchange.stop);}});fake_onhashchange=(function(){var self={},timeout_id,last_hash=get_fragment(),fn_retval=function(val){return val;},history_set=fn_retval,history_get=fn_retval;self.start=function(){timeout_id||poll();};self.stop=function(){timeout_id&&clearTimeout(timeout_id);timeout_id=undefined;};function poll(){var hash=get_fragment(),history_hash=history_get(last_hash);if(hash!==last_hash){history_set(last_hash=hash,history_hash);$(window).trigger(str_hashchange);}else if(history_hash!==last_hash){location.href=location.href.replace(/#.*/,'')+history_hash;}
4timeout_id=setTimeout(poll,$.fn[str_hashchange].delay);};return self;})();})(jQuery,this);