Let's discuss browser support caniuse.com shows an awful lot of green browsers:
Microsoft Edge supports srcset and Chrome, Firefox, Safari, Opera, and starting with iOS Safari 8.
Changing the option to Date Relative shows the support goes farther back for iOS:
It provides partial support from Safari 8.1 through to 8.4. It supports "resolution switching", which is what we're doing using the X descriptor; however, it doesn't support the full syntax, which I'll talk about a little bit more later in the section. One notable non-supported ...
