版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/imager.js/0.5.1/Imager.map.js
- https://cdn.bootcdn.net/ajax/libs/imager.js/0.5.1/Imager.min.js
Imager.js is an alternative solution to the issue of how to handle responsive image loading, created by developers at BBC News.