在IE11中使用`window.location.hash.includes`抛出“对象不支持属性或方法‘includes’”

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    $(document).ready(function(e) {
        if(window.location.hash) {
            var hash;
            if(window.location.hash.includes("?")) {
                alert('I have a ?');
                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')});
});

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

//str1 doesn't match str2 w.r.t index, so it will try to add object
var str1="acd", str2="b";
if(str1.indexOf(str2) == -1) 
  alert("add object");
 alert("object not added");
}

  if (!String.prototype.includes) {
    String.prototype.includes = function(search, start) {
      if (typeof start !== 'number') {
        start = 0;
      if (start + search.length > this.length) {
        return false;
      } else {
        return this.indexOf(search, start) !== -1;

在IE11中使用`window.location.hash.includes`抛出“对象不支持属性或方法‘includes’”

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