If you want to use a similar feature -today-, there's this service called Imgix: https://www.imgix.com/ https://www.imgix.com/ Basically, it allows you to use

If you want to use a similar feature -today-, there's this service called Imgix: https://www.imgix.com/ https://www.imgix.com/ Basically, it allows you to use responsive images using 1 single master image. Makes for a really snappy user experience, and it's very easy to integrate into any project, new or old.