Apple added 13 new WebKit features in Safari 11.1 and macOS 10.13.3, which were shipped last week.
API Worker Service
The Service Worker API allows scripts that run in the background to handle the widespread processing of Web pages. Service Worker scripts usually work with other, complementary APIs, such as the cache API, also included in this release, to store fetch requests and respses to improve network performance or provide an offline experience. The implementati of WebKit respects the principle of partitiing the cfidentiality of users by the origin of the document of higher level to avoid intersite mitoring.
For more details implementing WebKit for service workers, check out the blog "Workers at Your Serivce". API Request for Apple Pay
WebKit has added support for the payment request API to perform Apple Pay transactis. This allows traders to offer a payment …