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'Promise' is undefined in Internet Explorer (IE 11) in internal network

Dear all,

We are trying to run our app in IE 11 and it has occur 'Promise' is undefined in Internet Explorer (IE 11) error.
After we have refer your post at https://www.syncfusion.com/forums/136797/39promise39-is-undefined-in-internet-explorer-ie-11
, we know that it could solve the problem with a internet connection. 

But our client's environment is a internal network and can't be access internet. we have try to download https://cdn.polyfill.io/v2/polyfill.min.js file from internet and paste it into the local path as below, but same error has been occur. we are using Syncfusion.EJ2.MVC5.16.4.054 please advance, thx.

<body>
   <script src="~/Scripts/polyfill.min.js"></script>

    @Scripts.Render("~/bundles/jquery")
    @Scripts.Render("~/bundles/bootstrap")
    @RenderSection("scripts", required: false)
    @Html.EJS().ScriptManager()
</body>

polyfill.min.js

/* Disable minification (remove `.min` from URL path) for more info */

(function (undefined) { }).call('object' === typeof window && window || 'object' === typeof self && self || 'object' === typeof global && global || {});

1 Reply

MS Madhu Sudhanan P Syncfusion Team March 27, 2019 11:53 AM UTC

Hi Kenneth, 

Thanks for contacting Syncfusion support. 

Instead of using that file, please get the offline copy of the promise polyfill from the below BlueBird promise polyfill link. 


Here get the offline minified file from the Direct download section of the above page. 

Regards, 
Madhu Sudhanan P 


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