The following is a guest post by Mat Marquis. Mat has a important PSA for us regarding responsive images.
I don't want to bury the lede: if you're using a version of Picturefill from prior to 2.3.1, please update right away—update your
/lib files, file an issue on your project, or run a quick
npm update picturefill and let your mind be set at ease. There haven't been any breaking changes in any version of Picturefill 2, so you … Read article “Please Update Picturefill”