How to organize a picture replacement if the client is IE11?

Question

css

Because the donkey does not understand picture, it should probably be replaced with something (in a collision with a donkey). Those. you need to recognize the browser and do something about it. I came across modernizr, but I'm still dealing with it, so I'm making a request to APSquality, all of a sudden you can tell me something about this technology, or offer alternative solutions ... and I also need to run to work :)
Just a word: if there is a solution for View - I would look (a bit familiar).
In general, I need to design a component (so that it can be embedded anywhere) and I master the technology of correctly using images so that everything is beautiful everywhere, as much as possible. So you need to take into account both retinas and all sorts of donkeys, ...

Answer 1

​<picture>
 <source srcset="mdn-logo.svg" type="image/svg+xml">
 <img src="mdn-logo.png" alt="MDN">
</picture>

So if IE11 doesn't recognize the picture tag, it will ignore it and just display the nested img, right?

Answer 2

https://scottjehl.github.io/picturefill/