Polyfill for srcset feature as Web Components.

Load srcset-image.js in your HTML.

<script src='srcset-image.js'></script>

Modify your <img> elements such as following (srcset feature specification).

<img is='srcset-image' src='image.jpg' srcset='image-1.5x.jpg 1.5x, image-2x.jpg 2x'>

If browser does not support document.registerElement(), Images will be loaded as usual.

MIT