Add srcset attribute

[Siilwyn]

👋 hi @feross seems like this attribute is missing from conversion.

btw. I removed the trailing comma but with a trailing comma the git diff would be cleaner.

[feross]

@Siilwyn Thanks for the PR! Can you please share a link to the spec or any page that documents this property? I couldn't confirm that this attribute maps to the property you specified.

[Siilwyn]

@feross Hi you're welcome! There is a detailed page on srcset at MDN: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#attr-srcset

I got the transformation from srcset to srcSet by inspecting an image with the browser devtools and seeing $0.srcSet gives back the attribute value.

[feross]

I just tested with this code:

const img = document.createElement('img')
img.setAttribute('srcset', 'test')
console.log(1, img.srcset)
console.log(2, img.srcSet)

which outputs:

1 "test"
2 undefined

Are you sure that srcSet is the correct property name?

[Siilwyn]

Ah my bad, this doesn't seem to match up. Now that I'm thinking back at this issue I remember this had something to do with React. 🤔
I'll do some digging, perhaps React is just being the odd one for this attribute and it falls outside this project.

[feross]

Okay, no problem! I'll close this for now but do let me know if you discover that there's indeed a bug here :)