IE11 - Object doesn't support property or method 'assign'

[adamwinn]

Prerequisites

• [x] I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• [x] The issue still exists against the latest master branch of yii2-dynagrid.
• [x] This is not an usage question. I confirm having gone through and read the documentation and demos.
• [x] This is not a general programming / coding question. (Those should be directed to the webtips Q & A forum).
• [x] I have attempted to find the simplest possible steps to reproduce the issue.
• [ ] I have included a failing test as a pull request (Optional).

Steps to reproduce the issue

Setup Dynagrid and a DataProvider that allows for sorting. View the grid in IE11.

Expected behavior and actual behavior

When I follow those steps, I see... Error is shown.

jQuery.Deferred exception: Object doesn't support property or method 'assign' TypeError: Object doesn't support property or method 'assign'
   at sortable (https://site/assets/c92e3f8d0be9c026b31dad8166a5aea2/js/html5sortable.js:83:907)
   at KvHtml5Sortable.prototype._init (https://site/assets/c92e3f8d0be9c026b31dad8166a5aea2/js/kv-html5-sortable.js:11:28)
   at KvHtml5Sortable (https://site/assets/c92e3f8d0be9c026b31dad8166a5aea2/js/kv-html5-sortable.js:10:357)
   at Anonymous function (https://site/assets/c92e3f8d0be9c026b31dad8166a5aea2/js/kv-html5-sortable.js:11:442)
   at each (https://site/assets/00b40876bcb31f925b090f433d1ab742/jquery.js:29:158)
   at jQuery.prototype.each (https://site/assets/00b40876bcb31f925b090f433d1ab742/jquery.js:20:178)
   at $.fn.kvHtml5Sortable (https://site/assets/c92e3f8d0be9c026b31dad8166a5aea2/js/kv-html5-sortable.js:11:243)
   at Anonymous function (

SCRIPT438: Object doesn't support property or method 'assign'
File: jquery.js, Line: 252, Column: 384

I was expecting... No error

Environment

Browsers

• [ ] Google Chrome
• [ ] Mozilla Firefox
• [x] Internet Explorer
• [ ] Safari

Operating System

• [x] Windows
• [ ] Mac OS X
• [ ] Linux
• [ ] Mobile

Libraries

• jQuery version: v3.3.1
• yii2-dynagrid version: dev-master 16b9f2b

Isolating the problem

• [x] This bug happens on the demos page Note: Demo page wouldn't even load in IE11
• [ ] The bug happens consistently across all tested browsers Only IE11
• [ ] This bug happens when using yii2-dynagrid without other plugins.

[adamwinn]

Add the following polyfill and it should work:

https://cdn.polyfill.io/v2/polyfill.js?features=default,Object.entries,Array.prototype.includes

https://github.com/lukasoppermann/html5sortable/issues/445

[kartik-v]

Thanks.