Twenty Thirteen: Simplify responsive images

[obenland]

I think we could lose a lot of code for responsive images by being less selective. Themes like ​Able have proven it's sufficiency.

[lancewillett]

I prefer not to generalize this, we've tested the existing styles extensively in previous default themes and they work well.

I'd vote "wontfix".

[lancewillett]

The main reason we can't do this is because of user-generated markup in posts/pages. Users can change the width/height directly in their markup, and if we force height: auto; on those images their modifications won't work correctly.

That's why for height we target WP-generated class values specifically.

Also, a general selector would try to do this for all images in the site, like those added by a plugin. A "Like" button, for example, from Jetpack. That could lead to lots of unintended consequences.

[obenland]

Let me close this, apparently there has been a lot of thought put into the current way of doing this.