<div>
If the javascript is in the html it most likely is a setting issue (or conflict from a browser addon). If it is an external JS file linked in try to append async=&quot;async&quot; to it and/or clear browser cache.
</div>


If the javascript is in the html it most likely is a setting issue (or conflict from a browser addon). If it is an external JS file linked in try to append async="async" to it and/or clear browser cache.

<div>
Do they have the same operating system version? Technically, endsWith() isn't supported in IE 11?
</div>


Do they have the same operating system version? Technically, endsWith() isn't supported in IE 11?

<div>
<div class="content wysiwyg-content">
When I use IE 11 (in document mode &quot;Edge&quot;), the javascript function &quot;endsWith&quot; is not defined, and breaks if I call it from within the webpage.<br />
<br />
However, when I go sit down at my co-worker's desk and try it, it does have &quot;endsWith&quot; defined. &nbsp;So I compared the browsers and they are both IE 11 (down to the same version #).<br />
<br />
So,<br />
<br />
1. &nbsp;How is this possible? &nbsp;Is there some way to ammend/update/upgrade/impr<wbr />ove the browser's javascript?<br />
2. &nbsp;How am I going to debug multiple IE's given that two IE 11's are doing different things?<br />
<br />
<br />
<br />
Thanks!
</div>
</div>


When I use IE 11 (in document mode "Edge"), the javascript function "endsWith" is not defined, and breaks if I call it from within the webpage.

However, when I go sit down at my co-worker's desk and try it, it does have "endsWith" defined.  So I compared the browsers and they are both IE 11 (down to the same version #).

So,

1.  How is this possible?  Is there some way to ammend/update/upgrade/improve the browser's javascript?
2.  How am I going to debug multiple IE's given that two IE 11's are doing different things?



Thanks!

Testing/Debugging with Internet Explorer (Document Mode/Emulation)

Web browsers are applications used primarily to display documents, files and media from the Internet, identified by a Uniform Resource Identifier (URI) that can be a page, image, video or other file. Some browsers require the use of add-ons or extensions to safely render the information they receive; others have systems built into them to perform the same functions.

Web Browsers

JavaScript is a dynamic, object-based language commonly used for client-side scripting in web browsers. Recently, server side JavaScript frameworks have also emerged. JavaScript runs on nearly every operating system and  in almost every mainstream web browser.

JavaScript

Web development includes all aspects of presenting content on intranets and the Internet, including delivery development, protocols, languages and standards, server software, browser clients, databases and multimedia generation.