IE11 Build Issue

[porteron]

The react-material-stepper does not build successfully in IE11. After importing into a project and webpack builds, there is a syntax error in the vendor file that points to the react-material-stepper node module dist.

Works fine in all other browsers. The IE11 error console error is vague. "Syntax Error"

[porteron]

You can try loading the demo stepper in IE11 as well and you'll see the error.
https://apuchenkin.github.io/react-stepper/example/dist/simple/