JS interaction between src and srcset

Enable Chrome's flag, chrome://flags/#enable-experimental-web-platform-features

<img src="image-src.png" srcset="image-1x.png 1x, image-2x.png 2x">

<img src="image-src.png" srcset="image-2x.png 2x">

<img src="image-src.png" srcset="image-1x.png 1x, image-2x.png 2x">

.src="image-src-new.png"

<img src="image-src.png" srcset="image-1x.png 1x, image-2x.png 2x">

.srcset="image-1x-srcset.png 1x, image-2x-srcset.png 2x"

<img src="image-src.png" srcset="image-1x.png 1x, image-2x.png 2x">

.src="image-src-new.png"

.srcset="image-1x-srcset.png 1x, image-2x-srcset.png 2x"