Angular: "use strict" IE11

I ran into a problem in the browser IE11. The project is in Angular 2/4.

Error: Multiple definitions of a property not allowed in strict mode. In file main.bundle.js

I had the same issue, It is because I tried to use some code like a case on ng-class attribute.

To solved I just change this

<div class="imgComment" ng-class="[{'.jpg':'imgJpg',
                     '.csv':'imgCsv',
                     '.xls':'imgXls',
                     '.xlsx':'imgXlsx',
                     '.doc':'imgDoc',
                     '.docx':'imgDocx',
                     '.msg':'imgMsg',
                     '.png':'imgPng',
                     '.pdf':'imgPdf',
                     '.jpg':'imgJpg',
                     '.jpeg':'imgJpeg',
                     '.zip':'imgZip',
                     '.rar':'imgRar',
                     '.txt':'imgTxt'}['{{f.fileExtension}}']]"
                     title="{{f.originalFileName}}" ng-click="showImage(f.sharePointPath)">
                    </div>

for this

<div class="imgComment {{f.style}}" title="{{f.originalFileName}}" ng-click="showImage(f.sharePointPath)"></div>

and send the class in f.Style attribute

I don't know if the problem was because I put 2 '.jpg' options in the case of the ng-class, I just change the code and works.