classList not working in IE11, what can be done?

Question

JavaScript

In other browsers everything works, in IE11 it reaches the line and issues: Failed to get the "classList" property of a link whose value is undefined or NULL , please help me how to deal with it. In all other browsers everything works fine.
cards[i].classList.toggle('selected');

Answer 1

Try this polyfill

Answer 2

Back to top head

<meta http-equiv="X-UA-Compatible" content="IE=edge">

Answer 3

Here you need to look up what is inherited from what. Does cards[i] have prototypes?
In normal browsers, classList appears on Element. At microsoft splint - in HTMLElement. Therefore, an object that inherits from Element does not have a classList. For example, SVGSVGElement.