Material-ui: Component demos crashes in IE11

[tbruun]

• [X] This is not a v0.x issue.
• [X] I have searched the issues of this repository and believe that this is not a duplicate.

Expected Behavior 🤔

Using IE11 should work on the demo site

Current Behavior 😯

On some components, IE11 crashes.
"[object Object] is not iterable!"

Steps to Reproduce 🕹

Visit one of the links with IE11

Link:

1. https://material-ui.com/components/pickers/
2. https://material-ui.com/components/tables/

Your Environment 🌎

| Tech | Version |
|--------------|---------|
| Material-UI | v4.1.1 |

[oliviertassinari]

@tbruun Confirmed. But I don't think that it's the right place to open an issue:

• https://material-ui.com/components/pickers/

Object doesn't support property or method 'includes'

U=function(e){return 2===e.length&&e.includes("month")&&e.includes("year")}

https://github.com/mui-org/material-ui-pickers/blob/689a36b0a5a06d64eb8ee19c33b21ae21eb790b0/lib/src/_helpers/date-utils.ts#L79
cc @dmtrKovalenko

• https://material-ui.com/components/tables/

Object doesn't support property or method 'find'

return this.parentFunc?t="tree":this.columns.find(function(e){return e.tableData.groupOrder>-1})&&(t="group"),e===t}},{key:"sort",value:function(e,t,n){if("numeric"===n)

https://github.com/mbrn/material-table/blob/05c513a76d7f350ee12459cbd0cd46052b165938/src/utils/data-manager.js#L279
cc @mbrn

[dmtrKovalenko]

😱 😱 😱 😱
Will fix asap

[oliviertassinari]

Thanks! :)

[tbruun]

@oliviertassinari - Thanks for pointing it in the right direction :)

[mbrn]

I will fix it asap.

[oliviertassinari]

There is no urgency, I'm happy that it will eventually be fixed. IE 11 support is important for enterprises.

[dmtrKovalenko]

Fixed IE issue in @mui-org/material-ui-pickers v3.1.1

[oliviertassinari]

@dmtrKovalenko I can confirm it #16246 :)

[oliviertassinari]

@mbrn Did you found the time to look into the issue :) ? An advanced table component is most valuable for enterprises, enterprises are more likely to require IE 11 support. I believe it's an important dimension for your project.

[mbrn]

Hi @oliviertassinari ,

I am really very busy nowadays. But i will resolve this in 2 days:). Thanks for your patience.

[oliviertassinari]

No problem, as long as it wasn't forgotten, we are 👌