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I have implemented javascript fetch to call webapi in MVC view cshtml page. It is working in Chrome/Edge, but not working in IE. How to make fetch() work in IE.

Below code used in my application for calling MVC action method using fetch()
<script src="//"></script>
<script src=""></script>

        window.fetch("/Home/DownloadExcelTemplate", {
            method: 'GET',
            headers: new Headers({
                'AntiForgeryToken': 'XSS6GDB'
    .then(response => response.blob())
     .then(blob => {

        var linkElement = document.createElement('a');
        var url =  URL.createObjectURL(blob);

         linkElement.setAttribute('href', url);
         linkElement.setAttribute("download", '@request.Name'+"_Catalog.xlsx");
         //for Firefox
         document.body.removeChild(linkElement);   });


What I have tried:

I tried adding polyfill as given in code but didn't work.
Updated 22-Jan-19 1:31am

1 solution

Did you include a polyfill for Promise as well?
You will also need a Promise polyfill for older browsers[^]. We recommend taylorhakes/promise-polyfill[^] for its small size and Promises/A+ compatibility.
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