Release 1.5 not working with IE11

[liywjl]

The most of the functionality and demos in the documentation do not seem to work in IE11

• This is a v1.x issue.
• I have searched the issues of this repository and believe that this is not a duplicate.

Expected Behavior

Current Behavior

Dialogs do not appear when buttons are clicked, root links do not action anything when clicked, expansion panels do not expand, drawers do not appear etc...

Steps to Reproduce

Link:

1. https://material-ui.com/demos/dialogs/
2. https://material-ui.com/demos/expansion-panels/
   3.https://material-ui.com/demos/drawers/

Context

Your Environment

Tech	Version
Material-UI	v1.5.1
React	v 16.4.0
Browser	IE 11.0.9600
OS	Win7

[pelotom]

I have an app built on Material UI v1.5.1 with Dialogs and it all seems to be working fine in IE11. However it does seem that the material-ui.com site is not working too well in general on IE11. This might have something to do with it:

Are you seeing that your attempts to use a dialog or expansion panel within your own app are not working in IE11? If so can you post a codesandbox demonstrating the issue?

[oliviertassinari]

5 days ago: vercel/next.js#4988.