Internet Explorer 11 not working

[devcshort]

Yes I know, IE11 is dead and unsupported basically everywhere, unfortunately I'm required to support it for a project I'm working on...

Anyways, for some reason this library isn't working in ie11 and I can't figure out why. I'd assume I probably need a polyfill, but I'm not sure which one I would need.

Currently I'm using es6-promise, core-js, isomorphic-fetch, proxy-polyfill, and element-closest. Is there a specific one I need to add to get swr working in my project?

Thanks!

[koba04]

What errors did you see on IE11?