react-admin demo not working for IE11

[activist]

What you were expecting:
That the react-admin demo should work with IE11

What happened instead:
Hangs at loader page. Console error is "Object does not support assign method.."

Steps to reproduce:
Go to https://marmelab.com/react-admin-demo/ using IE 11. Page won't open.

[phacks]

Problem seems to have appeared between 2.3.2 and 2.5.1, and is currently preventing us to upgrade. I may have some time to look into this this weekend to see if I can figure out what caused it, and submitting a fix

[fzaninotto]

Between these releases, we upgraded the demo from create-react-app 1.0 to 2.0. That may be a cause.

[phacks]

Pushed a PR that fixed the problem in my local IE11 setup (CRA 2.0 needs to include polyfills for IE now) 🙂