• https://cdn.bootcdn.net/ajax/libs/workbox-sw/5.0.0-rc.2/workbox-sw.js
• https://cdn.bootcdn.net/ajax/libs/workbox-sw/5.0.0-rc.2/workbox-sw.js.map
• https://cdn.bootcdn.net/ajax/libs/workbox-sw/5.0.0-rc.2/workbox-sw.min.js