From Chrome 48 on desktop and Android, VP9 will be an optional video codec for video calls using WebRTC. VP9 can reduce data usage for users with poor connections or expensive data plans, requiring in best cases only 40% of the bitrate of VP8.
CSS variables, more accurately known as CSS custom properties, are landing in Chrome 49. They can be useful for reducing repetition in CSS, and also for powerful runtime effects like theme switching and potentially extending/polyfilling future CSS features.
Think of a preprocessor such as Sass like buying a house that is fully built. You know its features because it’s already fully formed – its rooms and features are already defined. However, adding new rooms and features to that house can be difficult.
On the other hand, PostCSS is like you have inherited a plot of land and a load of bricks. You can essentially create whatever you want, with whatever features you need.
Observables and “computed” values are something that every modern framework provides in some fashion. Frameworks that have explicit observables and computed values (Ember, Knockout, CanJS, etc) can provide high performance updates and a more natural development experience.
Parse is a Mobile Backend as a Service platform. In January of 2016, Parse announced that its hosted services would shut down within a year. In order to help its users transition away from the service, Parse has released an open source version of its
If landed, this will land behind a flag, moving out from behind the flag in the next major version as an unsupported API, finally becoming fully supported one major version after that. It does not replace or supersede the callback API, which will continue to be the canonical Node interface.