Why is svg in shadow dom not visible in IE 11?

Question

Browsers

Why is svg in shadow dom not visible in IE 11? Moreover, if you insert the svg purely with code without a sprite, then everything is OK, I use a sprite and now it does not display them, in modern browsers of course everything is OK, what's the matter? how to fix it so that the sprites still remain, and not shove the svg code into the chrome
markup itself

Answer 1

https://github.com/jonathantneal/svg4everybody
Or you need to insert the contents of the entire file with sprites into the page yourself (the polyfill does exactly that).