Imager.js
Responsive images while we wait for srcset to finish cooking
... as network friendly (only download what you need, when you need it). Imager has the ability to replace {width} with a non-numeric value if you provide the widthInterpolator option, which is a function that returns the string to be injected into the image URL for a given width. This feature allows you to use a human-readable name or integrate with third-party image providers.