With Chrome 54, you can now create your own custom HTML tag with and make re-usable web components with Custom Elements v1; it’s easier to send messages between open windows or tabs on the same origin with the
BroadcastChannel API; media experience get better on Android and foreign fetch is now available as an origin trial.
ResizeObserver lets you know when an element has changed its size.
An round up of the deprecations and removals in Chrome to help you plan.
Third-party services can start deploying their own network request handlers.
The full set of
CacheQueryOptions are supported, making it easier to find the cached responses you're looking for.
The BroadcastChannel API allows same-origin scripts to send messages to other browsing contexts. It can be thought of as a simple message bus that allows pub/sub semantics between windows/tabs, iframes, web workers, and service workers.