Using `window.location.hash.includes` throws “Object doesn't support property or method 'includes'” in IE11

According to the MDN reference page, includes is not supported on Internet Explorer. The simplest alternative is to use indexOf, like this:

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

IE11 does implement String.prototype.includes so why not using the official Polyfill?

  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;
      }
    };
  }

Source: polyfill source

Adding import 'core-js/es7/array'; to my polyfill.ts fixed the issue for me.

I had a similar issue with an Angular project. In my polyfills.ts I had to add both:

    import "core-js/es7/array";
    import "core-js/es7/object";

In addition to enabling all the other IE 11 defaults. (See comments in polyfills.ts if using angular)

After adding these imports the error went away and my Object data populated as intended.

As in Internet Explorer, the javascript method "includes" doesn't support which is leading to the error as below

dijit.form.FilteringSelect TypeError: Object doesn't support property or method 'includes'

So I have changed the JavaScript string method from "includes" to "indexOf" as below

//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");
}
else 
{
 alert("object not added");
}