IE11 - Object doesn't support property or method 'includes' - javascript window.location.hash -

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i checking url see if contains or includes ? in control hash pop state in window. other browsers aren't having issue ie.

the debugger gives me error when try load in way object doesn't support property or method 'includes'

i no error when load page in tghrough popstate

    $(document).ready(function(e) {         if(window.location.hash) {             var hash;             if(window.location.hash.includes("?")) {                 alert('i have ?');                 hash = window.location.hash.substring(window.location.hash.indexof('#') + 0,window.location.hash.indexof('?'));             }else {                 hash = window.location.hash;             };             if (hash=="#drs" || hash=="#drp" || hash=="#dffi" || hash=="#dci" || hash=="#dcp" || hash=="#drp" || hash=="#drma" || hash=="#eics" || hash=="#org"){                 $(hash+'content').addclass('pageon').removeclass('pageoff');             }else {                 $('#homecontent').addclass('pageon').removeclass('pageoff');             };         } else {             $('#homecontent').addclass('pageon').removeclass('pageoff');         }         $(window).on('popstate', function() {             var hash;             if(window.location.hash.includes("?")) {                 hash = window.location.hash.substring(window.location.hash.indexof('#') + 0,window.location.hash.indexof('?'));             }else {                 hash = window.location.hash;             };             if (hash=="#drs" || hash=="#drp" || hash=="#dffi" || hash=="#dci" || hash=="#dcp" || hash=="#drp" || hash=="#drma" || hash=="#eics" || hash=="#org"){                 $(this).navigate({target: $(hash+'content')});                 if(window.location.hash.includes("?")) {                 }else{                     location.href = location.href+'?';                 }             }else {                 $(this).navigate({target: $('#homecontent')});             };         }); });

according mdn reference page, includes not supported on internet explorer. simplest alternative use indexof, this:

if(window.location.hash.indexof("?") >= 0) {     ... }

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